The US Supreme Court has just dealt a serious blow to voters' rights that could help put John McCain in the White House by eliminating tens of thousands of voters who generally vote Democratic. By 6-3 the court has upheld an Indiana law that requires citizens to present a photo identification card in order to vote. Florida, Michigan, Louisiana, Georgia, Hawaii and South Dakota have similar laws. Though it's unlikely, as many as two dozen other states could add them by election day. Other states, like Ohio, have less stringent ID requirements than Indiana's, but still have certain restrictions that are strongly opposed by voter rights advocates.