Trump can invoke the Insurrection Act, and with complete legitimacy.
Yes, and you and I are afforded the 2nd amendment. We are NOT given the right to succeed.
SO, yes, POTUS could call in Martial Law. The military may instead turn on him and arrest him. Who knows? I know for damn sure Special Forces would not turn on him...I’ve personally been around Navy Seals and the scorn they had for Hillary/Obama was magnificent...
Perhaps many states have called Trump and told them he’d be supported if he did?
We are in unchartered waters....