Many of the Congressmen and Senators who voted to pass the Defense of Marriage Act (DOMA) are licensed attorneys. Those individuals were required to take an oath to uphold the Constitution of the United States and the State where they were licensed.
In addition, the ethics rules in many states require attorneys to avoid doing anything that would undercut the rule of law.
DOMA explicitly amends the "full faith and credit" clause of the constitution. Unfortunately, the U.S. Constitution may not be amended by Congressional fiat. Shouldn't the lawyers in Congress know that?
Since DOMA is clearly unconstitutional, should those attorneys who voted for it be subject to an ethics investigation and possible sanctions under attorney discipline rules?