What political party do these guys belong to?

Late last week, former Georgia senator Sam Nunn was on TV and said that he doesn't understand how anyone can sign a pledge saying that taxes should never be raised, as all options must be on the table to help balance the budget. Former Tennessee senator Bill Frist earlier this week told GOP governors that not only were the state exchanges in the Affordable Health Plan originally a GOP plan, but that the exchanges work. And a few days ago, Arizona senator John McCain got up in front of the Senate and basically said that Rep. Bachmann is lying about the the supposed mole in the State Department. He stated that the woman that Rep. Bachmann named was an impeccable woman, and a true American. But I wonder, what political party do these 3 men belong to? They're not Democrats, or at least they say they aren't. They can't be part of this new, mono-theocratic GOP, whose members must all believe the same thing, and those that don't agree with them aren't real Americans. I don't know what party they belong to, but it sounds a lot like a political party I used to belong to. Too bad it doesn't exist anymore, being taken over and then buried by the new GOP, called the Tea Party.