Idaho is in the northern west with a population under 2 million people and a conservative stronghold. But what if Idaho didn’t exist? Is there a way for Washington and Oregon annex the lands situated in the state?
1.As you mentioned the land could be annexed by Oregon and Washington, while looking for a means for them to do that I stumbled upon this.
2.It looks like upon Oregan being addmited into the union as a state that thier chunk of Idaho was transferred over to Washington in 1859 before it later being split between the Nebraska/idaho tarritorys in 1863 so it might also be possible to remove Idaho by having Washington retain it.
3.Alternatively instead of Idaho getting its own tarritory, have the entirety of it be folded into the Nebraska tarritory which if admited to the union as one state would be enormous (around the size of Texas) but empty. The chances of this happening I think are low but might be possible in a TL where the south needs to be appesed as the north grows in power. (Every state gets 2 senitors so despite its size it would remove a bunch of free state power in the senate)
https://en.wikipedia.org/wiki/Nebraska_Territory
(Just a shot in the dark about how this would happen but prehapse a timeline where the Mason Dixon line holds, the otl reason this spooked the south is becuse as more states where admited the free state vote would only grow so a means of keeping that fear at bay may be admiting most of the upper Mississippi as one state, in addition strict adhearance to the mason dixon line would mean Missouri becomes a free state and southern California may become a slave state)
https://en.wikipedia.org/wiki/Mason–Dixon_line )
3. Alternatively you could go 1 degree of division further and instead of haveing a united Nebraska have a united Dakota Territory
en.wikipedia.org
4. Finaly if Dakota is not united you could draw a division based on the tarritory not as north and south Dakota but as east and west Dakota, This west Dakota (light yellow west of the red line+Idaho to the west+northern Wyoming) would include some of the most otl underpopulated states which as a result get a disproportionate amount of senate representation as all states get 2 regardless of population so as a single state would make more sense in term of senate seats
Combining the modern population of these regions together, a alt state of west Dakota would have population of around 3 million based on otl numbers Likewise a alt east Dakota (otl combined north+south Dakotas) would have a combined population of 1.6 million
en.wikipedia.org
5. (Splitting the difference between 3 and 4) in looking at how to split states im scinario 4 I was originally thinking of a state division at the Missouri River but upon reviewing population data the population discrepancy would grow to big with west Dakota being almost 4 million (over 4 million if you include Southern Wyoming) leaving east Dakota around 1 million which at that point east Dakota may as well be folded back into minisota with west Dakota now being simply Dakota.
en.wikipedia.org
A admision into the union of a Dakota of this size (scenarios 4 and 5) when compared to the states around it (Washington 7.8 million Minnesota 5.7 million Oregon 4.2 million) would make a lesser united Dakota (made out of the dakotas west of the Missouri River, Montana Idaho, north Wyoming, and possibly south Wyoming) would have a population around 4 million putting them around Oregon in terms of size (scenario 3, if Dakota east of the Missouri river was included it would be around 5.2 million which would bring it closer to Minnesota)
en.wikipedia.org