That would be geographical suicide.
Romney would have to go afar to get someone who could bring a wide swath of voters. Sounds like Paul to me.
Let us negate all that by electing Newt or Rick.
Team Mittens has made the calculation that the Red States will never vote for The Kenyan (red state turnout be damned) and that Obama’s standing in the purple swing states is so bad that they will go RINO to win the purple states. So Christie is their VP pick. Ask Ann Coulter.