Iowa caucuses, built on myth, lose place at head of the line

              FILE - A pedestrian walks past a sign for the Iowa Caucuses on a downtown skywalk, in Des Moines, Iowa, on Feb. 4, 2020. (AP Photo/Charlie Neibergall, File)
              FILE - Democratic presidential candidate former Vice President Joe Biden speaks at a caucus night campaign rally on Feb. 3, 2020, in Des Moines, Iowa. (AP Photo/John Locher, File)
              FILE - Precinct 68 Iowa Caucus voters seated in the Biden section hold up their first votes of the caucus as they are counted at the Knapp Center on the Drake University campus in Des Moines, Iowa, Feb. 3, 2020. (AP Photo/Gene J. Puskar, File)
              FILE - Rep. Dick Gephardt, D-Mo., and his wife Jane wave to supporters after placing fourth in the Iowa caucuses on Jan. 19, 2003, in Des Moines, Iowa. (AP Photo/Charlie Riedel, File)
              FILE - Democratic presidential hopeful, former Vermont Gov. Howard Dean yells "YEAHHHH!!!" while addressing supporters during his caucus night party in West Des Moines, Iowa, Jan. 19, 2004. (AP Photo/Paul Sancya, File)
              FILE - Hands go up to vote for former Vice President Walter Mondale on Monday night, Feb. 20, 1984, at a Democratic Precinct Caucus at St. Anthony's Church School in Des Moines. (AP Photo/Charles Bennett, File)
              FILE - Presidential hopeful Sen. John Kerry acknowledges the crowd at a victory party Monday, Jan. 19, 2004, in Des Moines, Iowa after Kerry was declared the winner of the Iowa Caucus. (AP Photo/M. Spencer Green, File)
              FILE - Former Vice President Walter Mondale campaigns for the Democratic nomination for President on Feb. 23, 1983, in Des Moines, Iowa. (AP Photo/Roger Burdette, File)
              FILE - Democratic presidential candidate Jimmy Carter, center, reaches into a crowd gathered on the Van Ryswyk farm to launch his campaign at Des Moines, Ia., Aug. 24, 1976. Billed as a "Lemonade and Peanuts" affair, complete with balloons, signs, and crowds, Carter touched off his two-day stay in Iowa with the fundraiser. (AP Photo, File)
              FILE - Iowa Democrats gather to choose their candidate for the 2004 presidential election at a caucus meeting in Slater, Iowa, Jan. 19, 2004. (AP Photo/Nati Harnik, File)
              FILE - Democratic presidential hopeful, Sen. Barack Obama D-Ill., celebrates with his supporters after his victory in the Iowa caucus Jan. 3, 2008, in Des Moines, Iowa. (AP Photo/Rick Bowmer, File)