During remarks at an event in Maryland, Obama laughed as he ran through Republicans' various warnings -- and false claims they have made -- about the effects of the Affordable Care Act. One congressman called Obamacare "the most dangerous piece of legislation ever passed," Obama said, visibly amused. "Ever." He was referring to Rep. John Fleming (R-La.), who made the comment earlier this month. Other Republicans have warned the law will lead to "Armageddon," he said, and one state representative called it "as destructive to personal and individual liberties as the Fugitive Slave Act."