Sometimes we wonder if the Biden Democrats secretly admired some of Donald Trump’s stunts in the White House and decided that they could do them too when they were back in power. The latest example is President Biden’s dubious claim of executive privilege regarding his interview with special counsel Robert Hur. Mr. Biden sat for an interview over two days with the special counsel about his mishandling of classified documents. A pair of House committees sought the transcript and audio recordings of the interview, and the White House turned over the transcript. But on Thursday the President asserted executive privilege...