On Tuesday, voters in Crook County passed measure 7-86, which asked voters if they support negotiations to move the Oregon/Idaho border to include Crook County in Idaho. The measure is passing with 53% of the vote, and makes Crook County the 13th county in eastern Oregon to pass a Greater Idaho measure.
To the extent they contribute to Oregon’s electoral votes, they would then contribute to Idaho. The fact they are relatively lower population can still move the votes. Have a hard time digging up nice easy data, but they have 8 votes today and even a relative minority of voters going could change that from 8 votes all for democrats to 2 or 3 votes for republican. As someone else said, rinse and repeat for Washington state. Then, off to take part of california to make Nevada a sure thing for republicans and give nevada more votes. Also probably poking all over to erode blue states, carving out some of viginia between kentucky and west viginia, and illinois, colorado, and minnesota are also ripe targets. So Republicans can free up some of those electoral votes that are buried under blue, and press an advantage where they already overcome the popular vote with electoral votes a lot of time.
This is a strategy that won’t work for democrats, as the democratic regions in red states tend to be surrounded by a sea of red, with no logical way to ‘free’ those votes for the benefit of the democrats. They would instead have to push for proportional electoral college votes within their states or to go popular vote nationwide.
So on the one hand, the secession strategy shouldn’t work, as it is explicitly unconstitutional, but the GOP would really want it to happen, and they might be able to make it so. The converse strategies may be constitutional, but would require people to approve of it that would be explicitly undermined by it.