BuzzFeed writes, Ken Mehlman tells BuzzFeed he is pushing for same-sex couples' marriage rights “because we are conservatives, not in spite of it.” Here's how he got 80 prominent Republicans to join him in the fight. Image by Chip Somodevilla / Getty Images WASHINGTON — In one of the strongest shows of support for marriage equality ever demonstrated on the political right, more than 80 prominent Republicans have signed on to a Supreme Court brief laying out the conservative case for marriage equality — and elevating the longtime Bush aide behind the effort. Ken Mehlman, who served as an adviser to…