Democratic 2020 U.S. presidential candidate Warren holds a Get Out the Caucus Rally in Iowa City
U.S. Rep. Ayanna Pressley (D-MA) waits to introduce Democratic 2020 U.S. presidential candidate and U.S. Senator Elizabeth Warren (D-MA) at a Get Out the Caucus rally in Iowa City, Iowa, U.S., February 1, 2020. REUTERS/Brian Snyder