President Trump on Friday night fired Michael Atkinson, the inspector general for the intelligence community who had deemed “urgent” a whistleblower’s complaint about the president’s actions on aid to Ukraine. In a letter to the top Republican and Democrat on the Senate Intelligence Committee, the president said “it is vital that I have the fullest confidence in the appointees serving as inspectors general.” “That is no longer the case with regard to this inspector general,” Mr. Trump said. The president said the firing would take effect in 30 days and he will nominate a new candidate, who must be confirmed...