Republican presidential candidate Mitt Romney (right) and running mate Rep. Paul Ryan of Wisconsin greet supporters during a homecoming campaign rally Sunday in Waukesha, Wis. Justin Sullivan/Getty Images hide caption

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For Romney to win the election, he is going to have to pick off some big states from Obama's 2008 tally. AP hide caption

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Who will be Romney's VP? The naming of his running mate is likely going to come in mid-August, after his foreign trip and the conclusion of the Olympics. Ken Rudin collection hide caption

itoggle caption Ken Rudin collection

Condoleezza Rice, shown here visiting a school in Moscow in 2011, is the latest rumored choice for Mitt Romney's running mate. Korotayev Artyom/ITAR-TASS/Landov hide caption

itoggle caption Korotayev Artyom/ITAR-TASS/Landov