If Tuesday’s congressional testimony by William Taylor, the acting United States envoy to Ukraine, is to be taken at face value — and no one in the Trump administration has yet denied a word of it — then it is now beyond doubt: U.S. President Trump placed his personal political future above the national-security interests of the United States. He did so at the expense of longstanding foreign policy, a critical international alliance and the stability of the global order — and he used hundreds of millions of taxpayer dollars to do it.

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