White House explores options, including use of military force, to counter North Korea. Force always an option. https://t.co/pxzQUOiMGQ

— Ray Locker (@rlocker12) March 1, 2017

An internal White House review of strategy on North Korea includes the possibility of military force or regime change to blunt the country’s nuclear-weapons threat, people familiar with the process said, a prospect that has some U.S. allies in the region on edge.

While President Donald Trump has taken steps to reassure allies that he won’t abandon agreements that have underpinned decades of U.S. policy on Asia, his pledge that Pyongyang would be stopped from ever testing an intercontinental ballistic missile—coupled with the two-week-old strategy review—has some leaders bracing for a shift in American policy.

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About two weeks ago, Deputy National Security Adviser K.T. McFarland convened a meeting with national-security officials across the government and asked them for proposals on North Korea, including ideas that one official described as well outside the mainstream.

The request was for all options, ranging from U.S. recognition of North Korea as a nuclear state to military action against Pyongyang. Ms. McFarland’s directive was for the administration to undergo a comprehensive rethink of America’s North Korea policy.