The minute California secedes China will be right there to “protect them”. You don’t think California leftists won’t invite them in? Then you will have China at the Rockies instead of on the other side of the Pacific where they belong. If that happens we will cease to be a Pacific power. We will likely lose Hawaii next, then Guam. (Remember Hawaii does have a small loud independence movement, don’t know about Guam!). All the nations of the Pacific rim will start to make “accommodations” with China include Oz & NZ!
Also do you really think the Chinese will be content to sit there at the top of the Rockies and not stir up trouble in the other western states? Huge mistake to let California go! The thing to do if they try is , move in declare martial law and reconstruct California into 3 to 4 states.
See if those liberals like Reconstruction!
I think that everything you say has very real possibilities of happening. People would love to say “good riddance” to the vexing leftists (me too) but, in their haste would throw out the baby with the bathwater.