President Trump names Robert O’Brien as new national security adviser
President Donald Trump named Robert O'Brien, the US hostage negotiator, his new national security adviser on Wednesday. "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. I have worked long & hard with Robert. He will do a great job!" Trump tweeted.