I fully believe that Obama never took an oath to "preserve and defend the Constitution from all enemies foreign and domestic". That first oath was a fraud and the second one was more than likely another. He must be Impeached if for no other reason than to take the wind out of his sails.
Well, he certainly didn't take any oath seriously. Oaths mean nothing to those raised as Muslims practicing taqqiyah, and they don't mean much to confirmed Communists, either.