How much do you think things have changed since John Kelly became chief of staff? "The core of the White House of that first 6 months, the core of that staff is gone, so a lot has changed ... The thing that has not changed of course is Donald Trump." Wolff pic.twitter.com/oiPW4U3YQZ— Norah O'Donnell🇺🇸 (@NorahODonnell) January 8, 2018