Timeline I've seen so far is that Friday, Trump met with RNC head Ronna Mcdaniel(?), Mitt's niece.(isn't it nice how all these relatives of politicians all get nice cushy big bucks jobs in politics also? What a coinkeedink). Anyway, she has it. says a family member had it.
Next day is the Rose Garden Massacre. Now either Trump got it from Ronna(and the incubation period seems a bit short here, but maybe could happen), or maybe Donnie's been positive for longer than we know, and Ronna got it from Donnie. And then Donnie passes it on to everyone at the Rose Garden event.
Goes to the debate positive. Begins feeling sick and sluggish Wednesday. Some people are wondering whether before this, Donnie had been getting tested at all. People who meet with him have been getting tested, but has he? You know if he objected to it, they wouldn't do it, just like they let him out of the hospital. Explains why they won't say when he last tested negative. Because he hasn't been tested, so they don't know.
We'll see how many people at his NJ event start testing positive.