In a strongly worded legal brief, the Obama administration has said the federal act that defines marriage as being between a man and a woman was motivated by hostility toward gays and lesbians and is unconstitutional. The brief was filed Friday in federal court in San Francisco in support of a lesbian federal employee's lawsuit claiming the government wrongly denied health coverage to her same-sex spouse. The Justice Department says Karen Golinski's suit should not be dismissed because the law under which her spouse was denied benefits — the Defense of Marriage Act — violates the constitution's guarantee of equal...