Ah, the possibly Chinese-originated propaganda pushing for the Republic of Cascadia.

As a former resident, here's a few reasons why not.

First, there's already a looooot of rednecks and racists in every single state you talked about. In large numbers in rural areas. Simply smothering them with the numbers doesn't mean you simply can't represent them unless you just want someone else's dictatorship. They're still going to end up electing people you don't like, and the ratio won't be all that far off from now.

Second, Cascadia can't sustain themselves with water, power, or food. Where are you getting wheat from? How about ethanol? How about EV production? It's a guaranteed huge importer of lots of staples, severing infrastructure optimized over decades. So the first day you're stuck trying to import from farther away at the same cost as no tariffs overland from 1000 miles away.

Third, your top trading partners will totally abuse your desperation during the secessionist era. Putting you in a terrible place to start.

Fourth, you're now fully capitulating to the whims of the Broligarchs. WHY? Why do this? They can literally sink the whole country if 2 pull up stakes from Silicon valley.

Finally, last I checked, there isn't some secret sauce to either political party. No one is actually living in some utopia besieged by nasty conservatives from Iowa. There's no grass is greener situation here other than in your imaginations.