When thinking of a "National Divorce" the first thought is "secession," and in fact it is the first thing the media associates with calls to separate red states for blue states, as highlighted by an article over at the Daily Mail discussing how 66 million Americans agree with idea by Marjorie Taylor Greene regarding a national divorce.
The Daily Mail states "Secessionist movements are alive and well in Texas and eastern Oregon."
While technically secession is possible, the bar is so high, it isn't likely as the movement would need approval of both houses of Congress and then obtaining ratification by three fourths of the nation's legislatures, according to FindLaw.
Since a quarter of GOP voters are keen on the idea, and only 16% of Democrats favor the idea, the chances of getting both houses of congress and three fourths of the county's legislatures to agree on it, or anything for that matter, is highly unlikely.