“5. To hit a target at 150 yards with an iron sight takes an advanced trained shooter.”
I have trained hundreds of people to shoot. Many were/are naturals. One of my offspring was hitting targets at 200 yards 10 minutes after I handed her her first AR at age 10. It had standard military peep sights. Advanced shooter to shoot Trump - no. What he did suffer from was reacquiring the target.
Lead passing through the cerebrum tends to affect that.