New national security adviser faces personality test with Trump’s inner circle

Internal debates during President Donald Trump’s first two and a half years in office have been marked by acrimony, tension and high-stakes negotiations. So perhaps it was no surprise that Trump named as his fourth national security adviser the State Department’s lead hostage negotiator, Robert C. O’Brien.

No president has had so many national security advisers in his first term. However long O’Brien lasts in the job, his tenure will be defined less by his policy views and more by how he manages disagreements within Trump’s inner circle.

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