Who will be Mitt Romney’s running mate?

With the Republican presidential hopeful closing in on the GOP nomination, attention is beginning to turn to who he will pick to be by his side as he takes on President Obama and Vice President Biden for the White House.

Could it be Sen. Marco Rubio, a Hispanic conservative from the swing state of Florida? Maybe it will be Chris Christie, the bombastic governor from New Jersey unafraid to speak his mind? Or could it be a total dark horse candidate, say Gov. Susana Martinez from New Mexico, another conservative Hispanic from a swing state?

According to Larry Sabato, the director for the Center for Politics at the University of Virginia, Romney has two ways to go with his decision.

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