Once again, you're referring to some kind of bizarre non-existant "Fuhrer Oath."
They might make you take such an oath in the Whitehouse, but I assure you, we take an oath to defend the Constitution, not the President, out here in the real world.
And we even remember this part of the Constitution, that you have forgotten:
U.S. Constitution, Article 4 Section 4:
"The United States shall guarantee to every State in this Union a Republican Form of Government,
1. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.
That’s all you got, huh? Weak.