News that former UN Ambassador John Bolton will replace H.R. McMaster as White House National Security Advisor (NSA) may not be as surprising as the decision to drop Secretary of State Rex Tillerson for CIA Director Mike Pompeo last week, but the potential impact could be much greater when it comes to Washington’s North Korea policy.

Until Friday, the most hard-line Trump administration official seemed to be H.R. McMaster, who had warned that Pyongyang’s ultimate goal may be to use nuclear weapons to unify the Korean peninsula and said a nuclear North Korea