Now that Donald J. Trump is headed for the Oval Office, a question that attracted much fevered speculation during the campaign deserves more sober consideration: how to handle nuclear deterrence and the valuable alliances that are supported by the U.S. nuclear arsenal. Mr. Trump offered, and then tempered, reckless ideas during his campaign.

Following the election, he has seemed to step away from one of his most disruptive ideas. During the campaign, he suggested the United States might be “better off” if Japan and South Korea went their own way rather than remain under the protective nuclear umbrella of the United States, and called for removing U.S. troops from the region if both nations did not pay more. Continue Reading.