A senior Clinton campaign official told Lawrence O'Donnell "that
there will be a Democratic nominee by June 15. He could not bring
himself to say the words 'Hillary will drop out by June 15,' but that
is clearly what he meant."
"Everything about our conversation implied that he had already had
this reality-based discussion with Hillary. He said the Clinton
campaign plan is to collect as many votes and delegates as they can
right through June 3, then take no more than a week or so to make their
case to the superdelegates."
Meanwhile, Ben Smith notes that Clinton told a crowd in West Virginia that she's in the race "until there's a nominee."