Who will abandon Obama and Romney on Election Day?

Three new Washington Post polls in swing states reveal a positive snapshot for President Obama, who holds leads in Ohio, Florida and Virginia. For most voters, the decision is over: More than eight in 10 of each candidate’s supporters say they will “definitely” vote for them.

But, which pieces of the support coalitions for President Obama and former Massachusetts governor Mitt Romney are the shakiest? [cont.]

Scott Clement, Washington Post