Politics | national security adviser Trump Names New National Security Adviser It's hostage negotiator Robert O'Brien By Newser Editors and Wire Services Posted Sep 18, 2019 9:01 AM CDT Copied President Trump arrives at Los Angeles International Airport to attend a fundraiser, Tuesday, Sept. 17, 2019, in Los Angeles. (AP Photo/Evan Vucci) President Trump has named hostage negotiator Robert O'Brien to be his new national security adviser, reports the AP. Trump tweeted Wednesday that he has "worked long & hard" with O'Brien and that "he will do a great job!" Trump's announcement about O'Brien comes a week after he ousted John Bolton from the national security adviser's post, citing policy disagreements. Bolton was Trump's third national security adviser. Read These Next Think twice if you're in the UAE recording any missile strikes. Sheriff in Guthrie case says he may have a motive, and a warning. Have you ever seen an inflated kitten? Meet 'Puff Kitty.' The USPS' latest stamps go low, really low. Report an error