Stop the Impeachment Fishing Expedition

Congress has no business investigating the president for conduct that occurred before he took office.

As William Barr begins his term as attorney general, House Democrats are aiming a “subpoena cannon” at President Trump, hoping to disable his presidency with investigations and possibly gather evidence to impeach him. Mr. Trump fired back in his State of the Union address: “If there is going to be peace and legislation, there cannot be war and investigation.” To protect the presidency and separation of powers, Mr. Barr should be prepared to seek a stay of all congressional investigations of Mr. Trump’s prepresidential conduct.

The...