As far as I am concerned, the six are guilty of sedition at least.
You make your own decision.
SENATE AND HOUSE OF REPRESENTATIVES OATH OF OFFICE
“I do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter: So help me God.”
From the oath, you can see that you will be defending the Constitution -- not a person. Discipline and accepting orders is sworn to. Finally, you vow to face the UCMJ (Uniform Code of Military Justice) should any disputes arise.
The Oath of Enlistment (for enlisted):
"I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith ...