Trump names Robert O'Brien new national security adviser

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By Adam Edelman  with NBC News Politics
Image: Special Presidential Envoy for Hostage Affairs Robert O'Brien walks
Special Presidential Envoy for Hostage Affairs Robert O'Brien walks to a Stockholm court in a trial for A$AP Rocky on July 30, 2019.   -   Copyright  TT News Agency via Reuters file

President Donald Trump on Wednesday named Robert O'Brien, a State Department official who has specialized in hostage issues, as his new national security adviser.

"I am pleased to announce that I will name Robert C. O'Brien, currently serving as the very successful Special Presidential Envoy for Hostage Affairs at the State Department, as our new National Security Advisor," Trump tweeted. "I have worked long & hard with Robert. He will do a great job!"

O'Brien will replace John Bolton, whom Trump fired last week after a string of disagreements.