Potomac primaries
District of Columbia
Voting: 7 a.m.-8 p.m.At stake: Democrats, 15 delegates; Republicans, 16.
Democrats: Barack Obama is expected to win easily, in part because of the sizable African-American vote. Hillary Clinton has all but conceded the race.
Republicans: John McCain, with his long service in the US Senate, can claim native-son status. Mike Huckabee, the former Arkansas governor, is running as an outsider.
Maryland
Voting: 7 a.m.-8 p.m.At stake: Democrats, 70 delegates; Republicans, 37.
Democrats: Obama is well ahead in the polls and on Sunday picked up the endorsement of the state's largest newspaper, The Baltimore Sun.
Republicans: McCain is leading in the polls and won the Sun's endorsement. It is not a winner-take-all contest.
Virginia
Voting: 6 a.m.-7 p.m.At stake: Democrats, 83 delegates; Republicans, 60.
Democrats: Though she is well behind in the polls, Clinton is focusing on Virginia as her best hope today. Both she and her husband, former President Bill Clinton, focused their campaigning on the state yesterday. Obama could benefit from independents and Republicans who cross over to vote in the open primary.
Republicans: This is the most competitive of today's three contests and awards the most delegates, with the winner getting all of them. If independents and moderate Republicans decide to vote in the Democratic primary, that could hurt McCain.
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