[JURIST] House Speaker John Boehner (R-OH) [official website] on Friday announced that he is launching a legal advisory group to defend [press release] the Defense of Marriage Act (DOMA) [text; JURIST news archive]. "The constitutionality of this law should be determined by the courts, not by the president unilaterally, and this action by the House will ensure the matter is addressed in a manner consistent with our Constitution," the press release said. The Bipartisan Legal Advisory Group is a five-member…