A fourth state, Ohio , was also scheduled to vote Tuesday. Polls and 2016 primary results suggest former Vice President Joe Biden is the heavy favorite over Vermont Sen. Bernie Sanders across Tuesday's map. If he sweeps all three primaries, he could lock in an insurmountable lead, all but clinching the party's presidential nomination. Then, late Monday night, it was off again -- as DeWine's state health director, Dr. Amy Acton, issued a special order closing polling places, declaring it a public health emergency. Future elections in questionThe future of this year's primaries beyond the three primaries on Tuesday is uncertain.

Source: CNN March 17, 2020 09:33 UTC