Is it now so politically incorrect to oppose gay marriage that a white shoe law firm will throw over a client rather than defend a law signed by President Bill Clinton? Apparently so, after yesterday's show of invertebrate representation by King and Spalding, the giant Atlanta-based law firm. King and Spalding dropped the House of Representatives as a client yesterday only days after agreeing to argue for the House in defending the constitutionality of the 1996 Defense of Marriage Act, or Doma. The jilting prompted the firm's lead attorney in the case, former U.S. Solicitor General Paul Clement, to resign...