What is "this"? The guy stalking Trump? The guy knowing where Trump was going to be? The Secret Service shooting at him?
In the whole thing, two parts amaze me:
1) Trump taking time off during the backstretch to golf
2) Team Trump announcing to the world where he'd be on his day off
I've seen pictures of the Secret Service detail assigned to Trump during one of his golfing excursion when he was president. It was like a huge donut of agents surrounding him. Agents everywhere in all direction. He currently gets additional agents because of the previous attempt, but nothing like the stadium sized number of agents that cover a sitting president. Pretending that the Secret Service should be omniscient or omnipotent is just silly. Candidates simply don't get the protection that the office holder does.
Just as an aside. I don't think Trump particularly wants to win. He took time off to golf. He's having an open affair with the very weird Laura Loomer. He doesn't talk with energy. And he is absolutely indifferent about the boat anchor JD Vance.
He is, after all, 78 friggin' years old, and a very old man. There are unsummoned quiet times in his head. And they get longer and longer.