Former Vice President Joe Biden removes a pen cap to edit his speech before a rally in Indianola, Ia.
Spectators watch the seventh national Democratic debate on Jan. 14, 2020 in Clive, Ia.
U.S. Sen. Kamala Harris, D-Calif., speaks at an Indianola, Ia. residence on Thursday, July 4, 2019, as part of a three-day campaign over the holiday weekend.
Supporters of Michael Bennet hold signs as he speaks at the Polk County Steak Fry on Sept. 21, 2019 at Water Works Park.
Businessman and 2020 presidential candidate Andrew Yang delivers a speech at the Des Moines Register Political Soapbox on August 8, 2019.
U.S. Sen. Michael Bennet, D-Colo., speaks at the AARP Presidential Forum at the Hotel at Kirkwood Center in Cedar Rapids, Iowa, on July 17, 2019.
Former Vice President Joe Biden speaks during the AARP Presidential Forum at Drake University's Olmsted Center in Des Moines, Iowa on July 15, 2019.
Sen. Beto O'Rourke, D-Texas, speaks at the Polk County Steak Fry on Sept. 21, 2019 at Water Works Park.