National Politics & Government Trump Appoints H.R. McMaster As New National Security Adviser 4:43pm February 20, 2017 by Tamara Keith U.S. Politics National Security Share URL copied to clipboard! Copyright 2017 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered Politics & Government Trump rallies in Michigan as Biden isolates Science Shortwave podcast explores Pluto's planetary demotion 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate