There are a total of 370 total delegates at stake for Democrats; 256 for Republicans. All four presidential contests today are open primaries, meaning independents and Republicans could choose to vote in the Democratic race since the GOP race is less competitive.
Vermont: 15 Democrat, 17 GOP delegates at stake; Polls close at 7 pm ET
Ohio: 141 Democrat, 85 GOP delegates at stake; Polls close at 7:30 pm ET
Rhode Island: 21 Democrat, 17 GOP delegates at stake; Polls close at 9 pm ET
Texas: 193 Democrat, 137 GOP delegates at stake; Polls close at 9 pm ET. Caucuses then begin after the polls close.