Robert O'Brien pictured at a court in Sweden. Photo: AP

Donald Trump replaces John Bolton with US hostage negotiator Robert O’Brien as national security adviser

  • Unlike Bolton, O’Brien is not a big name in the intelligence and national security world
  • New appointment comes as Trump faces a number of crises in the Middle East, as well as possible nuclear talks with North Korea
Topic |   Donald Trump

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Robert O'Brien pictured at a court in Sweden. Photo: AP
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