What we would do if there were such a SCOTUS and if such-and-such laws were later passed gets further into conjecture than we really need to go. That will be for each of us to decide if and when such time comes.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman