Trump is backed by the NRA, and what the NRA did was kowtow to the leftists in suggesting there was a problem of bump stocks and devices that help accelerate semi-auto fire, when they said the BATFE should reevaluate them. Trump is now following through with what seems like a recommendation by NRA, and in that it's my opinion that the NRA now will not be in a position to oppose any such measures.
Yep similar to MG ban in 1986. With NRA blessing.