Oregon counties vote to secede to Idaho | TheHill 

Voters in five rural Oregon counties approved measures on Tuesday to consider joining the state of Idaho, a part of a long-shot grassroots movement to break with a state dominated by liberal voters west of the Cascade Mountains…

Actually moving the lines would require a vote from the Oregon legislature, which is firmly controlled by Democrats. Oregon and Idaho would have to strike a formal deal, which would then need to be ratified by the U.S. Congress.

Congress has only approved measures to change state lines on three occasions: Kentucky was carved out of territory previously owned by Virginia in 1792. Maine was carved out of Massachusetts in 1820. And West Virginia was admitted to the union in 1863, in the midst of the Civil War, as Union counties separated themselves from the Confederacy.

Source: Oregon counties vote to secede to Idaho | TheHill