NEW YORK (AP) — Many obstacles still lie ahead for supporters of same-sex marriage, and eventually they will need Congress or the Supreme Court to embrace their goal. For the moment, though, they are jubilantly channeling the lyrics of "New York, New York."With a historic vote by its Legislature late Friday, New York became the sixth — and by far the most populous — state to legalize same-sex marriage since Massachusetts led the way, under court order, in 2004.With the new law, which takes effect after 30 days, the number of Americans in same-sex marriage states more than doubles. New York's population of 19 million surpasses the combined total of Massachusetts, Connecticut, Vermont, New Hampshire and Iowa, plus the District of Columbia.The outcome — a product of intensive lobbying by Democratic Gov.