But can the state courts charge her with treason?
There once was a legal concept of treason to the individual states. I think only 3 such convictions in our history.
Thomas Dorr was convicted of treason against Rhode island in 1842, later amnestied. John Brown was convicted of treason to the state of Virginia and Joseph Smith was convicted of treason against the state of Missouri.
Treason against the state is still in many state constitutions, but since the Civil War its pretty much a dead legal concept. Maybe it shouldn’t be!