No he doesn't, his choice is Santorum.
But like all the other talking heads and right wing politicians have announced that they will support Romney if he is the nominees.
In my mind this allows the GOPe to continue to press their Progressive candidate with no fear of losing the base. Those that have announced they will support Romney include every conservative you have seen mentioned on this board. DeMint, Thune, Jeb, GW, Rush, Levin, Hannity, Huckabee, Trump, and of course the biggest horn tooter of all.