Ohio postpones Democratic primary, Florida workers a no-show

The new coronavirus hampered efforts by voters to get to the polls in some states on Tuesday as the global pandemic left the Democratic presidential primary consumed with uncertainty.

Leaders in Ohio called off their primary just hours before polls were set to open, citing the need to combat the coronavirus. Voting moved forward in Florida, Illinois and Arizona, but challenges emerged as some poll workers didn’t show up and those who did tried to create distance among voters to comply with new health guidelines limiting large gatherings.

In Florida,...