“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.
So if voters approved this, it would still take an act of Congress in Washington to happen.
What if voters in some regions approve it but others don’t?
So what about North and South Dakota then, as well as East and West Virginia? Plus how about Joisey and New Yohke?