Assuming this can be taken seriously,
This would mean -
The entire US West Coast including WA and OR would be included in the split, the same factors would drive them, but all three of these would have internal counties splitting as well. This will leave one long strip of a country, like Chile, from Mexico to Canada. This is viable, sort of.
Hawaii would go too, either joining CA, WA and OR or being separately independent. Hawaii is not really a viable economy on its own though. It would be interesting to see what happens.
The US would have no military access to the Pacific, so the US will cease to be a Pacific power. The new CA WA OR state would have limited economic and military potential, and its politics would be extremely pacifist anyway. China will inherit the Far East and Pacific.
Alaska presents an interesting question. It would be hostile to CA WA OR, and it would have insecure communication with the remainder of the lower 48 as its trade mainly passes through Seattle.. Perhaps it would join Canada.
This will precipitate a general breakup of the US I think. Much of the East coast, from VA to ME is also likely to be a separate state. The remaining interior, “flyover”, will be a contiguous mass led by Texas as the economic power.
Isolated parts of the interior will have an uncomfortable situation, notably Illinois.
You can bet that the leftists, for all their pacifist bullshit, will demand control of the military power so they could intimidate, even attack, the conservative middle portion.
But for this to happen, they would have to win the war.
We’ll just nuke ‘em and declare victory. ;-)
As somebody that believes that an amicable divorce would solve A LOT of our seemingly intractable political issues, I say GO FOR IT!!! If the left and right coasts want their people’s republics, they can have ‘em and have all of that they can stand and then some.
Then, when they come sniveling back into a system that has embraced personal liberty in another 20 years, this crap can be settled for a generation or two — perhaps even longer if their socialist utopias collapse as badly as others have...