President Trump was nano windage away from death. A basic training soldier is expected to master 150-400 yards. The head of the Secret Service must go as well as the person in charge on the ground.
The out briefing was attended by the chain of command, to include the CG of 32nd AADCOM. His job was to relieve the chain of command up to and including the Group Commander.
This failure by the SS deserves nothing less.