This is NOT ABOUT "DOMA", although this example arose due to DOMA. Republicans and Conservatives keep chanting "States Rights, States Rights" like a religious verse in the Bible. Now all the Republicans and Conservatives are saying the Federal Government must cram its rules down the throats of states. Same with Keystone Pipeline. "States have all the rights,.. unless WE (Republicans) say otherwise." (State of Nebraska refused to allow pipeline trough its state, and the FG did not force them to have it).