I can't find a proper link right now, but former New Republic owner Martin Peretz is supporting Obama for president. Left-wing bloggers rather frequently accuse Peretz of being a "right-winger," and a "neocon" because he has rather hawkish pro-Israel views. I'm not sure why having such views makes one a "right-winger", but if it does, then I take it that Peretz is the charter and likely only member of "Right-wingers for Obama."