All of today's primaries are open.

Vermont: 15 Democratic delegates at stake
polls close @ 7PM ET

Ohio: 141 Democratic delegates at stake
polls close @ 7:30PM ET

Rhode Island: 21 Democratic delegates at stake
polls close @ 9PM ET

Texas: 193 Democratic delegates at stake
polls close @ 9PM ET (although most close @ 8PM ET);
caucuses slated to begin 15 minutes after the polls close