And what happens if someone goes to the Supreme Court to challenge this?
See, we're heading down an awful slippery slope. Amending the constitution based on hypothetical problems and possible future rulings from the Supreme Court. IF the Supreme Court said the Defense of Marriage Act violated Full Faith and Credit, then we could amend the Full Faith and Credit clause to eliminate marriage from it.
This way we still have a Constitution that respects the concepts of a Federal Republic.
I wish people would think this through. It is the Socialist agenda to kill the Republic and have the states melt away.. this only helps them.