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Louisville mayor’s race plays out amid lingering tensions

Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg, a Democrat, prepares to knock on a door in Louisville, Ky. on Thursday, March 31, 2022. Greenberg, a Democrat, was shot at in February at a campaign office but was not struck, though a bullet grazed a piece of his clothing, police said. (AP Photo/Piper Hudspeth Blackburn) Mayoral candidate Craig Greenberg discusses a canvassing route with campaign worker Ronel Brown, a retired firefighter and former special education teacher in Louisville, Ky., on Thursday, March 31, 2022. (AP Photo/Piper Hudspeth Blackburn) FILE - Louisville Democratic mayoral candidate Craig Greenberg speaks during a news conference in Louisville, Ky., Monday, Feb. 14, 2022. Louisville's mayoral race is taking place in a city roiled by racial tension, a spike in gun violence and deep misgivings many harbor about the Louisville police department. (AP Photo/Timothy D. Easley, File)