I won’t claim to know about ability to produce the components of a weapon or ability to actually use one, but it appears that the only facility in the US that has the capacity to assemble or disassemble nuclear weapons is in Texas.

https://www.dshs.texas.gov/texas-radiation-control/emergency-preparedness-radiation-control-program/pantex-nuclear-weapons-facility#:~:text=Pantex Plant is America’s only,an Army Ordinance Corps facility.

I just thought that the prospect of Texas trying to secede is a bit more complicated and scary, and thought I would offer a take to balance the jokes.