Joe Biden adds more primary victories over Bernie Sanders

Democratic presidential candidate and former Vice President Joe Biden speaks at a campaign event in Columbus, Ohio, Tuesday.

Democratic presidential candidate former Vice President Joe Biden, right, speaks with Deaunte Bell Jr., 11, of Columbus, Ohio, at a campaign event in Columbus, Ohio, Tuesday.

Democratic presidential candidate and former Vice President Joe Biden speaks at a campaign event in Columbus, Ohio, Tuesday.

Democratic presidential candidate former Vice President Joe Biden speaks with reporters as he leaves a campaign event in Columbus, Ohio, Tuesday.

A worker carries chairs after a campaign rally for Democratic presidential candidate former Vice President Joe Biden was cancelled at Cuyahoga Community College, Tuesday, in Cleveland, due to health concerns with the coronavirus.

Democratic presidential candidate Sen. Bernie Sanders, I-Vt., visits outside a polling location at Warren E. Bow Elementary School in Detroit, Tuesday.

Democratic presidential candidate Sen. Bernie Sanders, I-Vt., visits custodian Davonta Bynes, from left, principal DaRhonda Evans-Stewart and social worker Kim Little outside a polling location at Warren E. Bow Elementary School in Detroit, Tuesday.

A man walks out of the Huntington Convention Center of Cleveland where Democratic presidential candidate Sen. Bernie Sanders, I-Vt., was prepared to hold a campaign rally, Tuesday, in Cleveland. The Cleveland rally was canceled due to concerns about coronavirus.

A woman votes in the presidential primary election at the the Summit View Church of the Nazarene, Tuesday, in Kansas City, Mo. The polling place served two precincts as voters who were scheduled to vote at a nearby senior living facility were directed to vote at the church after the facility backed out due to coronavirus concerns.