Robert O’Brien’s tenure as Donald Trump’s White House national security advisor was a difficult ... fully appreciate the precise nature of his responsibilities. The New York Times published ...

National Security Advisor-designate Michael Waltz receives baton from National Security Advisor Jake Sulivan (center). Steven J. Hadley (left) watched along with USIP’s George Moose and John J.

Ahead of that address, Nick Schifrin sat down with one of the key architects of Biden's foreign policy, National Security Advisor Jake Sullivan, to discuss his time in the administration and where ...