Oklahoma Attorney General Scott Pruitt, seen at a news conference in early 2011 before he took office, promised to file a lawsuit soon after he was sworn in. He did.
Credit Sue Ogrocki / AP
The Affordable Care Act survived a near-death experience at the Supreme Court earlier this year. And the overhaul law's fate again hangs in the balance come Election Day. Mitt Romney has vowed to work for its repeal, if he's elected president.