Three states hold primaries as coronavirus upends 2020 election

Arizona, Florida and Illinois are holding presidential primaries as scheduled on Tuesday, amid concerns over the coronavirus epidemic. Ohio postponed its election by declaring a public health emergency in an extraordinary decision made hours before polls were due to open.

Joe Biden and Bernie Sanders are competing for the opportunity to lead their party in a campaign season suddenly overshadowed by a pandemic that has closed borders, shaken the economy and swept every corner of public life.