"Birthers" are backed into a corner when it comes to the eligibility of Sen. Ted Cruz, R-Texas, to run for president. The tea party favorite released his birth certificate Sunday showing that he was born in Canada to an American mother. That makes Cruz a dual citizen of Canada and America. Some claimed that Barack Obama couldn't be president because they believed (falsely) that he wasn't born in the United States. Will they hold Cruz to that same standard? Most legal scholars believe that an American born overseas to an American parent is still eligible to be president, but that's not what birthers believe – at least while Obama is president.