FILE - In this June 27, 2019, file photo, Democratic presidential candidates, former Vice President Joe Biden and Sen. Bernie Sanders, I-Vt., speak at the same time during the Democratic primary debate hosted by NBC News at the Adrienne Arsht Center for the Performing Arts in Miami. What might be the final showdown between the two very different Democratic candidates takes place Tuesday, March 17, 2020, during Florida's presidential primary. (AP Photo/Wilfredo Lee, File)
March 17, 2020
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5 questions heading into Tuesday's Democratic primaries
Four states had been scheduled to hold Democratic presidential primaries on Tuesday amid a global outbreak of the novel coronavirus, but leaders in Ohio called off their election, citing public health concerns. Arizona, Illinois and Florida say they're going ahead with plans to vote. Here are five questions ahead of voting: