Romney will never get the nomination, a mormon doesnt have a chance in the south.
He would win it because of his views on economics or his strong stances on foreign policy. Without getting into the details of what Romney will say or do, the south will have a reason to vote for the GOP candidate somewhere along the lines. Obama got the rich white snob vote in MA, RI, and CT.
Romney might also be able to cut into that vote in the NE. Haley seems like a very intelligent woman as well who would be a plus to the ticket.