I think he is just trying to protect the covenant God gave us in the Bible. And for the record... I believe they should make some kind of ammendment regarding heterosexuals and divorce and adultry and such.
Yes, but if he did that heteros would complain because of seperation of church and state. However they look the other way when it comes to gays and lesbians. It's not the presidents job to protect the convenant of God.