Pie in the sky..not going to happen. As a long-time Idaho resident I'd wonder about the pluses and minuses of the move as regards tax revenue and the added burden of maintenance. Not to put too blunt a point on it..southern Oregon is pretty poor.
However...given the high hurdles in the way..just a lot of hot air.
U.S. Constitution, Article IV, Section 3:
New States may be admitted by the Congress into this Union; but no new State shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or Parts of States, without the Consent of the Legislatures of the States concerned as well as of the Congress.
Word is Idaho has something in common with Nevada due to California's exodus. Even if Oregon could join Idaho, they're soon to be blue if not already anyway. Nevada is now blue, for the short term anyway, Vegas runs the place. I've lived in Nevada since birth, but if we take this too far add me to Nevada's exodus. Something about over-crowded, disrespect, high taxes, inflation, invasion, stupidity, PROG-think & laziness bugs me.