One of the oldest tactics in war is to lay seize to an enemy's position, cutting off commerce, resupply and comms.
I would support a deployment of ANG/ Army around CHAZ preventing all commerce, resupply and comms. Shut off food, water, electricity. Their comms will fail shortly from lack of battery charging. Additionally, do not communicate with their leaders. Make them imagine what is coming.
Set up concert quality speakers and blast Tammie Wynett at them 24x7. Fly flood light equipped Blackhawks and Hueys all night just circling. Have tracked vehicles constantly driving just out of range of sight. Drop leaflets explaining how to surrender with minimal repercussions and offering rewards for early leavers.
Immediately arrest any mayor, governor and sheriff failing to enforce good rule and support this exercise of US authority.