"marriage is being redefined"
Right. How come all the Conservatives aren't standing outside the county courthouses protesting the thousands of no-fault divorces issued everyday in the US? Marriage is not a "lifelong" commitment in the eyes of the Government. It is a "commitment until one party files suit is a Court of appropriate jurisdiction to terminate all legal ties to the other spouse". THAT'S IT.
The Supreme Court has recognized a fundamental right to Marriage, which also means, people have the unlimited right to divorce too.
"Children need a mother and father". Tell that to the Family Court Judges across the US. You'll end up in jail because those judges hold more power than prosecutors, police, and legislatures combined.