President Donald Trump has named Robert C. O’Brien as his new National Security Adviser, replacing John Bolton who was fired last week.

“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 said on Twitter 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!

— Donald J. Trump (@realDonaldTrump) September 18, 2019

Trump had said Bolton had been a “disaster” on North Korea policy, “out of line” on Venezuela, and did not get along with important administration officials.

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