Washington is in an impeachment frenzy, which is a dangerous moment for facts and context. A classic example is the political and media overreaction to Monday’s stories concerning Secretary of State Mike Pompeo and Attorney General William Barr and impeachment.

Mr. Pompeo’s alleged misdeed is that he was among those listening to Mr. Trump’s July 25 telephone call with Ukraine President Volodymyr Zelensky. But why shouldn’t a Secretary of State be on a call to the new President of an important country? U.S. foreign policy...