Newt Gingrich may have called Mitt Romney a big liar, but Gingrich would still vote for him if he won the Republican nomination. Despite having lobbed continuous attacks against his opponent in the presidential primary, Gingrich admits he'd rather have Romney in the White House than President Obama. The former speaker gave a somewhat backhanded explanation of his potential endorsement on ABC's Good Morning America on Monday. "I think reelecting Obama is a disaster and I'll certainly endorse the Republican nominee. But I think that Mitt Romney will have a very, very hard time differentiating himself [from Obama]," he said.