Pennsylvania Republicans hope against hope that Mitt Romney, who made a late play for their state, can pull off an upset win there. But they acknowledge it's hard to get the math to add up.
Polls close in six Eastern states at 7 p.m. If the networks call Virginia quickly for Obama, it could be an early sign of victory. But don't expect speedy presidential election results in battleground Ohio, where provisional ballots could make for a long night.
Democrats prevailed in Senate races in Massachusetts, Indiana, Wisconsin, and Pennsylvania, indicating that the Senate will remain in Democratic hands.