The federal judge who overturned California's same-sex marriage ban this week is a Republican who once came under fire for his membership to a powerful all-male club that had only recently allowed blacks to join. But after Chief U.S. Judge Vaughn Walker struck down the voter-approved ban known as Proposition 8, he became something else in the minds of some: a gay activist. Rumors have circulated for months that Walker is gay, fueled by the blogosphere and a San Francisco Chronicle column that stated his sexual orientation was an "open secret" in legal and gay activism circles. Walker himself hasn't...