This, but unironically. Los Angeles itself could easily be turned into a complete deathtrap. Los Angeles is actually completely boxed in by mountains - the San Gabriels to the north, and the San Jacinto mountains and Anza-Borrego desert to the east.
You could actually isolate all the overland routes and lay siege to the entire region.
Should simply just cut out the liberal cities and let them be nation states. Then blockade them.
This, but unironically. Los Angeles itself could easily be turned into a complete deathtrap. Los Angeles is actually completely boxed in by mountains - the San Gabriels to the north, and the San Jacinto mountains and Anza-Borrego desert to the east.
You could actually isolate all the overland routes and lay siege to the entire region.