Can Mitt Romney Really Repeal Obamacare?

Mitt Romney says he'll grant a waiver to all 50 states on Day 1 of his presidency so that they don't have to comply with the Affordable Care Act. But even his supporters question whether he would have the legal authority to do that. He's also promising to repeal it — a process that could take months, at a minimum — and he may not be able to totally repeal the law.