Which is why we are in trouble.
It's McCain, Romney, or Giuliani. Any combination of the three can beat Clinton/Obama. A Romney/Giuliani or McCain/Giuliani ticket with the promise that as VP, Giuliani will directly oversee Homeland Security would be the best option.
Regardless, social conservatism and NeoCon adventurism have been stopped in their tracks by the 2006 election results. It' s either back to a Goldwater-like focus on libertarian civil rights themes, fiscal conservatism, and national defense, or four more decades in the wilderness.