In 1996, Congress passed the "Defense of Marriage Act," which limited marriage to a man and a woman. In 2004, state ballot measures on same-sex marriage helped turn out Republican voters. In the first few months of his administration, President Obama's Justice Department supported DOMA. But last month, Attorney General Eric Holder called the law indefensible on constitutional grounds. So, where are the Republicans now? Members of Congress and potential presidential candidates have focused almost entirely on enforcing the law, but not on same-sex marriage itself. Have they decided that "it's the Economy, stupid," after all? We look at the law---and the politics.