EditorialVoters cast their ballots on the last day of early voting at the Story County Administration in Marshalltown, Iowa, Monday, Nov. 2, 2020. (Kathryn Gamble/The New York Times)
EditorialCampaign signs are taken down after a presidential primary campaign appearance by former Vice President Joe Biden at the fairgrounds in Marshalltown, Iowa, Jan. 26, 2020. (Tamir Kalifa/The New York Times)
EditorialFormer Vice President Joe Biden, a Democratic candidate for president, speaks with a supporters during a campaign event in Marshalltown, Iowa, on Sunday, Jan. 26, 2020. ( Tamir Kalifa/The New York Times)
EditorialFormer Vice President Joe Biden, a Democratic candidate for president, speaks with a supporters during a campaign event in Marshalltown, Iowa, on Sunday, Jan. 26, 2020. ( Tamir Kalifa/The New York Times)
EditorialFormer Vice President Joe Biden, a Democratic candidate for president, shakes hands with Jake Vilsack, 10, a grandson of former Iowa Gov. Tom Vilsack, during a campaign event in Marshalltown, Iowa on Sunday, Jan. 26, 2020. (Tamir Kalifa for The New York Times)
EditorialTeagan Wilcox shows her support for Sen. Elizabeth Warren (D-Mass.), a Democratic candidate for president, during a town hall campaign event at Fisher Elementary School in Marshalltown, Iowa, Jan. 12, 2020. (Tamir Kalifa/The New York Times)
EditorialSen. Elizabeth Warren (D-Mass.), a Democratic candidate for president, speaks at a rally in Marshalltown, Iowa, on Sunday, Jan. 12, 2020, three weeks before the Iowa Caucus. (Tamir Kalifa/The New York Times)
EditorialSen. Elizabeth Warren (D-Mass.), a Democratic candidate for president, campaigns in Marshalltown, Iowa, on Jan. 12, 2020. (Tamir Kalifa/The New York Times)