"In 1996, I signed the Defense of Marriage Act," says former President Bill Clinton in The Washington Post. DOMA, which prevents federal recognition of same-sex marriage, is up for review at the Supreme Court on April 27, and the justices will have to decide whether the law "is consistent with the principles of a nation that honors freedom, equality, and justice above all," Clinton says. In the 17 years since he signed it, the former president says, "I have come to believe that DOMA is contrary to those principles and, in fact, incompatible with our Constitution." (He's not alone: Read...