Ohio won't count its provisional ballots, cast by voters who say they're legit but don't appear on the precinct list, until November 17. Not to jinx it, but there's no great reason to be worried. Ohio only recounts if the final margin is below 0.25 percent. Assuming normal turnout, that would be around 15,000 votes; if the polls are right, the winner should break that easily. Up to 250,000 provisionals could be cast, but both parties expect that vote to break for the Democrats, as it has in every election. So, unlikely that a close race with Romney down by 15,000 or so would be reversed by provisionals.