Lincoln acted in time of war under war powers authority. Likewise Wilson and Roosevelt.
Instead the president is the chief of the executive branch of government and he can invoke the powers of the Department of Justice to pursue constitutional rights of parishioners if he sees fit. But I know of no warrant for the president to send in the 101 airborne.
To protect the first amendment rights of the population?
My understanding is that Title 10 and Title 32 give the President the authority under homeland defense.
No God, but at least you will have “muh Constitution.”
I know of no constitutional authority which permits the president of the United States to send in Armed Forces because he disputes the action of the state governor.>>>>>>>>>>>
As far as I know there is none and we have The Posse Comitatus Act, United States federal law (18 U.S.C. § 1385, original at 20 Stat. 152)
But that doesn’t mean that the Commander in Chief can’t make the order and have it happen.
Who is going to stop our military? But I assume the National Guard would be nationalized as you say.
He can act to ensure that each state continues to function as a representative form of government and to ensure that the Constitution is not being violated by said states. He can absolutely emergently act to ensure that constitutional rights are being upheld. The courts could always make their rulings later.