Not going to happen. AGs will sue before it has any kind of enforcement. Also, regardless of what the Supreme Court was made up of, gun control legislation has a poor track record in court.
That said, don't get complacent, write your state AG right away.
Given Dr. Seuss was also recently relevant...
Fun fact: Chuck Jones animated the Private Snafu shorts made for US military cadets, since conveying the message to those struggling to read was a real concern at the time. Dr. Seuss wrote quite a lot of the episodes.
Trump is not perfect with what he backs (Romney comes to mind), but at least he knows his shit. I forgot who he endorsed for Alabama's open senate seat vacated by Jeff Sessions, but Roy Moore won the primary instead. Even putting the phony accusations aside, he's still a pretty lousy candidate. The Trump-backed Tommy Tuberville on the other hand had no problem winning that seat when endorsed over the disgraced Sessions.