The only solution is to split the country in half
United West
United East
Half on one side and half on the other
And when you get tired of your sh!thole side we dare you to step foot on ours
Thought we tried that 150 years ago or so - didn’t take.
Historically we have divided countries many times for many reasons - most fail. Same reasons that combining countries failed.
It’s pretty simple - our national government exist to legislate “big picture” things only - individual states handle anything not involving a “national” concern - including weapons and licensing. The constitution assures citizens a right to own them - that remains national but licensing is 100% a states decision - so long as it is reasonably obtainable to the ordinary citizen. You can own one subject to local regulation- which cannot place a high burden of responsibility or entry to any citizen wishing to own a weapon.