The constitution prohibits the military from being used against the people.
That’s why I was wondering who the top generals would obey, the Usurper in chief, or the constitution of the USA?
Where?
It does no such thing. It's silent on the issue, but the militia, the organized portion of which is the National Guard, may indeed be called forth "to execute the Laws of the Union, suppress Insurrections and repel Invasions;"
That's from Art I, section 8. Section 9 contains those things Congress, and thus the federal goverment, may not do, using the Army to "suppress Insurections" is not one of them.
The Posse Commitatus *law* does prohibit use of the Army and Air Force to enforce the laws, and the Marines and Army are prohibited from doing so by regulation. Regulations are changeable with the stroke of a pen, the DemonRats have shown they can pass, and thus change, the law PDQ when they want.