He can't, and he won't. You have all sorts of contracts, business relationships, etc. Dependent upon that trade. Components manufactured in one country for use in another, etc. If you ripped everything up - which he couldn't do unilaterally anyway because - the disruption would be immense.
You'd have to pass something setting a repeal date a few years down the road.
Oh I know. But it’s apparent some people don’t.