“I do know some of her donors and my guess is they want her staying in to put Trump through his paces. They don’t put it on the record but they think there’s a reasonable chance that something will happen to Trump, either health-wise or conviction to the extent that he can no longer be the nominee.”--Larry Sabato, director of the Center for Politics at the University of Virginia.

That is exactly what AP reported a day or two ago and beyond a reasonable doubt they got it from Sabato.