US Senator Scott Brown, an opponent of gay marriage when he was in the Massachusetts Legislature, said in a statement today that gay marriage is “settled law” in Massachusetts and should be decided by the states instead of the federal government. Brown’s leading Democratic opponent, Elizabeth Warren, has been courting the gay and lesbian community by advocating aggressively in favor of gay marriage. In March, Warren told the Washington Blade, a gay newspaper, that President Obama should complete what he had previously characterized as an “evolving” opinion on the subject.