AdvertisementBit By Bit, Trump Is Shredding Credibility Of White House OfficialsMay 16, 2017David FolkenflikfacebookEmailNational Security Adviser H.R. McMaster, right, takes to the stage Tuesday at the White House after being introduced by Press Secretary Sean Spicer. Both of them, as well as Vice President Mike Pence, have had their credibility damaged after issuing denials that President Trump later reversed. (AP)