Trying to deploy the U.S. military "on our own shores" against lawful speech and activity is blatantly illegal.
The U.S. Posse Comitatus Act:
“Whoever, except in cases and under circumstances expressly authorized by the Constitution or Act of Congress, willfully uses any part of the Army, the Navy, the Marine Corps, the Air Force, or the Space Force as a posse comitatus (a group of people who are mobilized by the sheriff to suppress lawlessness in the county) or otherwise to execute the laws shall be fined under this title or imprisoned not more than two years, or both.”
You'd expect a sitting congressman to know the law (or at least research it) before spouting this kind of BS. But who am I kidding? Johnson is a Republican who is not subject to the Constitution or the laws that the rest of us must follow.
“Conservatism consists of exactly one proposition, to wit: There must be in-groups whom the law protects but does not bind, alongside out-groups whom the law binds but does not protect.” - Frank Wilhoit