The vote is considered the first step toward eventually allowing gay marriages to be performed in Washington.Congress,which has final say over the city's laws, will get 30 days to review the bill assuming Democratic Mayor Adrian Fenty, a supporter, signs it. If Congress takes no action, the bill will become law automatically. President Barack Obama and congressional leaders have not signaled where they stand on the D.C. bill. Obama generally supports civil unions but has said marriage is between a man and a woman.