Obama, Romney campaigns brace for battle after Tuesday’s vote

As President Obama and Republican challenger Mitt Romney began their final visits to swing states Monday, their campaigns were already preparing for a complicated — and possibly long — battle over Tuesdays vote.

In the key battleground state of Ohio, a new dispute has broken out over the validity of provisional ballots. That fight increases the possibility that, if Tuesdays election comes down to the Buckeye State, it wont end on Tuesday night at all.