He explained to me that the military has no authority to make arrests on US soil outside of a military base. The only people who can arrest elected officials are the US Marshals. And they can even arrest the president...
That’s why they are swearing in 4000 us marshals from National Guard as we speak.
Checkmate.
National Guard can be used for domestic law enforcement under 3 exceptions: 1) under control of the state governor, 2) from an act of congress, or 3) invocation by the President of the Insurrection Act.
These Guardsmen are under US Marshall (federal) control, so we know that exception #1 is not at play here.
I know of no recent Act of Congress calling for NG to by deputized.
That leaves exception #3.