Maybe it does while inside the convention center walls, but what happens immediately outside the building and at every parking garage, bus stop, and anywhere else ppl have to go after said convention? I mean, it's like lining up to get shot, raped, and murdered. Got a suit on? Give me your wallet. Got a "Make America Great Again" hat on, give me your car. Got a "Choose Cruz" button on? Give me your life.
The Secret Service (SS) can't be everywhere protecting everyone. This is going to get super ugly.