I think Rove has Bush's posistion carefully measured out here. It's carefully calculated so that Bush can play the conservative moderate role, arguing against Gay Marriage while being able to say he has nothing against gay people.
Rather like the people who, until recently, said they had nothing against black people, but that black/white marriage was racially unsound and against God's will.
But I suspect it will play well in the press, because the posistion Bush has staked out is designed to blend with the majority of Americans. The majority of Americans support legal rights for gay couples, but get uncertain when the marriage word is used.
Jay