Just think of what Woodrow Wilson stood for: he stood for world government. He wanted an early United Nations League of Nations. But it was the conservatives Republicans that stood up against him.
I like Mitt Romney as a person. I think he's a dignified person. But I have no common ground on economics. He doesn't worry about the Federal Reserve. He doesn't worry about foreign policy. He doesn't talk about civil liberties so I would have a hard time to expect him to ever invite me to campaign with him.