You’re quoting Wikipedia as some sort of authoritative source? Please!
He doesn’t have to - there are plenty of polls showing that gay marriage has surpassed 50% nationally. And even though that is inflated by overwhelming support in certain large blue states, the overall trend in everything but the darkest red is still very, very disturbing.
So ball’s in your court - why is all of reality wrong and your hopes are correct? Why should we believe that we’ve already won this fight, against all actual evidence?