Memo to POTUS: Angry with Lee? Insist He Free Amb. Tan

President Trump has expressed frustration with his South Korean counterpart, Lee Jae Myung, over his unwillingness to help the U.S. in the Strait of Hormuz. In response, American participation in annual military exercises with the Republic of Korea has been cut back. Mr. Trump is right to be upset with Lee, but has plenty of other reasons -- and a more pointed and desirable vehicle for expressing…