For the first time since losing the White House to President Obama, Mitt Romney sat down for a TV interview that airs on Sunday. "We were on a roller coaster, exciting and thrilling, ups and downs," Romney told Fox News, in an excerpt released Thursday night. "And then you get off. And it's not like, oh, can't we be on a roller coaster the rest of our life? It's like, no, the ride's over."