If so, Trump is practically certain to win. But,
"An observation: there was no ambulance or medics on the scene as Trump was taken away in an armored vehicle. Stay tuned and be skeptical."
https://asiatimes.com/2024/07/trump-shooting-looks-like-professional-hit-job/
Now, the D-camp has nothing to lose. It should find someone-- NOT Biden or anyone other likely candidates-- to make a public, and high-profile, accusation that the Trump camp staged the attempted assassination (at the cost of real human lives) in order to get sympathy votes, and let Trump to do the explaining.
If Trump could give a perfect story, nothing changes. If his can't, or the whole thing is indeed staged, then the D-camp could turn the table.
I am neither pro-Trump or pro-Biden. I don't think their China policies would be fundamentally different. I just want to have a good spectacle to enjoy.