I have a friend who was guarding Wallace that day and disarmed Bremer. He said when you are in crowds like that, viz. the Trump picture, personal protection is impossible. I am sure Trump was wearing a vest.
I was a junior in high school when Wallace was shot. It was a turning point. Nixon had been heavily discredited and the very viable democrat candidacy was the aim of Wallace. Bremer fit the cia type of assassin/fall guy. Either Nixon, or maybe Humphrey-McGovern, wanted Wallace out of the way. Being shot 5 times has to grab your attention, with one in the spine. Nixon later moved more to the right to absorb some of Wallace’s views on desegregation. We were riding busses all over town to go to school, it was crazy. This era marked the resurgence of the liberalism/progressivism that under kennedy/johnson, carter, and later clinton, and now obola, has led to the now-defacto-suspended US constitution and freedoms.