This is absolutely false. FF&C cannot force a state to violate its own laws. If Tennessee does not recognize gay marriage, a gay marriage from another state is null and void in Tennessee.
Oh really? Does Tennessee recognise marraiges from other states when one of the parties to the marriage is under the age of consent but over the age of consent in the state they came from?
You bet your bottom dollar they do.
Totally false. For example: A handful of states allow first cousins to marry. A marriage that is proscribed in the vast majority of states. However, once married, that cousin/couple is married in all 50 states.