Personally I think state governors should be preemptively deploying their own National Guards to protect their citizens' Constitutional rights against this out of control federal executive. With neither Congress nor the Supreme Council doing their jobs, the states have become the remaining check against rampant federal lawlessness.
https://www.msnbc.com/news/news-analysis/trump-national-guar...
If he does he can (and will) federalize all National Guard units so they in fact become "federal troops" and this can (and will) allow his "own" federal military through Hegseth to deploy and operate domestically. Additionally he can declare a portion of the US population "insurrectionists" and act upon it, without interference of local law enforcement and government (and the risk of also labeled the same if they do).
As a European with quite some knowledge about European history hopefully I do not have to take a history book and explain the repercussions of Trump doing this?
The catch is that the routes, as of yet, purport to impose operational restrictions on the federalized units. The administration isn’t exactly strictly following them, but they still exist and district judges are attempting to enforce them. The administration is hard at work developing a “colorable” basis to invoke the Insurrection Act in order to remove nearly all such restrictions.