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.
The number of electoral votes and the number of reps is based on population and is decided by the census.
So if this happens, at the latest, the votes would get fixed in 2031. But I wouldn’t be surprised if this is part of the deal. Obviously those switching to Idaho want to bring their votes with them.