In my opinion there would be troops in the streets beating up ANTIFA and BLM.
Perhaps he would deport them to some uninhabited land. That's what he did with the Indians.
You think he would hang the mayors and Governors for treason for allowing such seditious behavior? I look at the nullification crisis for that thought, Didnt he threat to hang the whole South Carolina state Legislature starting with his own former VP in John C Calhoun for treason over such mutiny?