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.
Electoral college. Idaho always goes red, Oregon always go blue. Moving population from Oregon to Idaho transfers electoral votes from a blue state to a red state.
Whether it matters or not depends on whether it changes the tipping point state in any given election, which is hard to know in advance, but for the red team it is at worst identical to the current setup and at best a small boost to their chances in a presidential election. Conversely for the blue team it can either be meaningless or a slight negative.
a shift of ~ 240k people from oregon to idaho would result in oregon going back down to 5 congressional districts, and idaho gaining one for three. so one electoral vote moves from a reliably-democratic state to a republican one. that one elector could very well swing a presidential election.
iirc, changes to state boundaries requires approval of both states and congress (and also the president, who would have to sign-off on the legislation passed there). oregon would never go for it–not entirely sure idaho would be on-board, either, even with the thought of gaining a congressional seat. providing state services and funding to that region would be a perpetual net-drain on idaho’s economy.