Tinah Estrada, working at the receiving station for El Paso County, gives directions to Steve Nordberg, an election judge at the El Paso County Courthouse during the presidential primary in El Paso, Texas on Super Tuesday, March 3, 2020. AFP
Democratic Presidential Candidate former Vice President Joe Biden speaks to a crowd during a campaign rally at the National World War I Museum and Memorial on March 7, 2020 in Kansas City, Missouri. AFP
A supporter wears a mask to attend a Joe Biden rally in St. Louis, Missouri, U.S., March 7, 2020. Reuters
Supporters hold up signs before Joe Biden holds a rally at Kiener Plaza Park in St. Louis, Missouri on March 7, 2020. AFP
Senator Amy Klobuchar, who dropped out of the race to be a Democratic candidate, campaigns for Joe Biden at a Women for Biden event in Southfield, Michigan on March 6, 2020. AP
Joe Biden is greeted by supporters at a campaign stop in Kansas City, Missouri on March 7, 2020. Reuters
Senator Bernie Sanders, an Independent from Vermont and 2020 presidential candidate, speaks during a Get Out The Vote rally in Detroit, Michigan on March 6, 2020. Bloomberg
Attendees hold a sign at a Get Out The Vote rally with Senator Bernie Sanders in Detroit, Michigan on March 6, 2020. Bloomberg
Attendees stand in front of an American flag during the Get Out The Vote rally with Bernie Sanders on March 6, 2020. Bloomberg
Supporters of Bernie Sanders listen to a panel on African-American issues during a town hall in Flint, Michigan on March 7, 2020. Reuters
Tinah Estrada, working at the receiving station for El Paso County, gives directions to Steve Nordberg, an election judge at the El Paso County Courthouse during the presidential primary in El Paso, Texas on Super Tuesday, March 3, 2020. AFP
Democratic Presidential Candidate former Vice President Joe Biden speaks to a crowd during a campaign rally at the National World War I Museum and Memorial on March 7, 2020 in Kansas City, Missouri. AFP
A supporter wears a mask to attend a Joe Biden rally in St. Louis, Missouri, U.S., March 7, 2020. Reuters
Supporters hold up signs before Joe Biden holds a rally at Kiener Plaza Park in St. Louis, Missouri on March 7, 2020. AFP
Senator Amy Klobuchar, who dropped out of the race to be a Democratic candidate, campaigns for Joe Biden at a Women for Biden event in Southfield, Michigan on March 6, 2020. AP
Joe Biden is greeted by supporters at a campaign stop in Kansas City, Missouri on March 7, 2020. Reuters
Senator Bernie Sanders, an Independent from Vermont and 2020 presidential candidate, speaks during a Get Out The Vote rally in Detroit, Michigan on March 6, 2020. Bloomberg
Attendees hold a sign at a Get Out The Vote rally with Senator Bernie Sanders in Detroit, Michigan on March 6, 2020. Bloomberg
Attendees stand in front of an American flag during the Get Out The Vote rally with Bernie Sanders on March 6, 2020. Bloomberg
Supporters of Bernie Sanders listen to a panel on African-American issues during a town hall in Flint, Michigan on March 7, 2020. Reuters
Tinah Estrada, working at the receiving station for El Paso County, gives directions to Steve Nordberg, an election judge at the El Paso County Courthouse during the presidential primary in El Paso, Texas on Super Tuesday, March 3, 2020. AFP