The President is playing with fire, which is just how he likes it
The administration's language was extreme. Its actions, so far, have been more limited. But that's small comfort. The potential next step is plain to see. If the administration (in its sole discretion) believes that this first, limited deployment is insufficient, then it will escalate. It will shout 'Insurrection!' and 'Migrant invasion!' to justify more military control and perhaps the invocation of the Insurrection Act.