Well #1 definitely is not going to work, as making clergy the authority on marriage when it's a governmental thing is clearly contradictory to Separation of Church and State.
I don't know how a politician could actually see that as plausible, to be honest.
#2, however, is actually pretty interesting- disallowing federal judges to make decisions on gay marriage.
It's sort of a backdoor to leaving such authority to states, but it surfaces, indirectly, the notion of checks and balances.
The federal courts are getting to comfortable slamming the hammer in things they ought not even be a part of.