While most presidential campaigns have been offering lists of their high-profile advisers, Mr. Trump had repeatedly declined to reveal his, offering only that he developed his views about world affairs from listening to experts on television, and that he liked to come up with his own ideas.
That changed on Monday when, in an interview with The Washington Post editorial board, he shared the names of five advisers who signed up to be on his team: Joseph E. Schmitz, Gen. Keith Kellogg, Carter Page, George Papadopoulos and Walid Phares.
But in many cases, even Google offered little but outdated biographies of Mr. Trump’s new cast of experts, and on Tuesday, most of them proved elusive when sought for interviews.
...Mr. Papadopoulos, a London-based energy analyst who lists his participation in the 2012 Model United Nations on his résumé, was traveling, and his employer said he was unreachable.
And others could say little about how they were helping Mr. Trump. None have spoken to their new boss.