The Obvious Question

Okay, I read this and now I'll ask The Obvious Question…

Late Thursday night, Donald Trump asked aides if it was too late for him to back out of his decision to make Indiana Gov. Mike Pence his vice presidential running mate, according to reporters at CNN and NBC News.

Did Donald Trump really have someone with him late Thursday night who was trusted enough to be in that meeting but who later turned around and told reporters — at networks Trump doesn't like, no less — that Trump had second thoughts about maybe the most important decision of his campaign? It does make a guy who wants to the most important "decider" in the world look bad that he waffled on this. Who leaked this and why?