All these commies want to secede from the Union, fine. Just leave the eastern part from the crest of the Sierra Nevada and other areas and we’ll take it and call it Free California. The Conservatives have moved to these areas already like me and my family.
Post re-construction (civil war) LAW gives the president the authority to federalize a states national guard. This gets around the Posse Comitatus in the Constitution.
The federalized national guard can be ordered to arrest the governor, every legislator, every justice all the way down the chain to the janitors. Any federalized national guard that refuses is charged under the UCMJ and would probably go to federal prison for 20 years if lucky.