Idk about the valiance of a bunch of those. A couple - banning bump stocks, rescheduling cannabis, psychedelics - were on rails from prior admins. I really don't know about Project Warp Speed, given how he immediately tore the wiring of the program out in his second term. I guess I'll spot you the penny.

If I was going to point to anything during his time in office, it was the Afghanistan withdrawal. Except that... glances at the half dozen other wars he started... idk if that gets to count on the balance.