President Trump spent the weekend turning on two US security partners. He ordered a cutback in joint military exercises with South Korea, citing his “very good relationship” with Kim Jong Un, the North Korean dictator — and threatened to bomb Oman, one of the countries mediating between Washington and Tehran.

On Sunday, Trump posted on Truth Social that based on his “very good relationship with Kim Jong Un” and the finances required, he ordered Pete Hegseth to “substantially reduce” annual joint military exercises with South Korea, designed to prepare against threats from North Korea. At the end of his post: “While........

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