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. Sue Ogrocki/AP hide caption

itoggle caption Sue Ogrocki/AP

A budget crunch in Oregon led to an unintended experiment that helped researchers assess Medicaid's effect on adults' health. iStockphoto.com hide caption

itoggle caption iStockphoto.com