Fox News reports a “top Democrat” is opposed to the “greater Idaho” movement without focusing on who or why. Permit me to remedy those deficits.
The top Democrat quoted is an Idaho Democrat who isn’t excited about adding a bunch of conservative Oregonians to the ID voter rolls. No surprise there, life is tough for Ds in ID now and adding a bunch more Rs would make it tougher.
On the other hand, highly placed Democrats in Oregon are receptive to the plan as it will give them even greater control in what remains of Oregon and eliminate the subsidy the blue part of OR now provides to the sparsely populated red parts that want to leave.
Politically, what OR Democrats feel about the move will be important as they control OR. What ID Democrats feel about the move won’t be important as they don’t control ID, Republicans do.
Thus the opinion of the “top Democrat” cited isn’t particularly relevant unless they can move their party nationally to oppose a border relocation. That could be relevant if Congress has to buy off on the boundary change.