I can't pretend I fully understand what's going on with the UK leaving the EU. I grok that some understand the issue better than I, so please, tell me if I've got the situation or not.
Let's pretend the United States gives amnesty to all illegal aliens and refugees, and opens its borders.
This creates plethora of issues, among them criminal activity, over population, a refusal to integrate, and last but not least, unemployment.
New Jersey, which already has a huge unemployment problem of its own, says, "Fornicate this noise, we're leaving," and secedes from the Nation. So, if you weren't a natural born NJ citizen, you now need a visa/green card/citizenship to work and live in NJ. The flip side is, NJ natural born citizens now need these things to work elsewhere in the US. This includes me and my wife, who live in NY. Our daughter was born in NY, so if we move back, she'll have to apply for citizenship. So will our son, because he was born in SC. This situation has ramifications all over the country, especially because NJ is basically a suburb for NYC. And don't forget the elderly who moved to FL or AZ years ago to retire.
So now, NJ jobs are preserved for the New Jersians. This looks great on the surface. The only problem is, there really weren't that many jobs to begin with. Its only export is horrible reality shows about horrible people, the green flies and annoying pine needles that plague the Jersey Shore, and tourism-mainly people going to Headquarters 10 in Morristown to see if that guy who scans the movie tickets with his finger is still working there after all these years (is he?)
The other issue is that many NJ companies who did business throughout the US are now thrown into disarray. New tariffs and agreements have to be drawn up. NJ also received federal aid for many industries, especially for the perpetual roadwork on 287 that was planned to last for all eternity.
To complicate matters further, NJ is actually made up of two separate nations. The Pork Roll people voted to stay in the US, while the Taylor Ham nation was unanimously for leaving. There is now talk of the Pork Rollers seceding from NJ so they can try and rejoin the US.
Anything I missed?