JOHN LUCAS: No, Mr. Secretary, generals do not have civil service protection or tenure. They serve at the pleasure of the president. “Five of the ten living former Secretaries of Defense ratcheted up the warfare against President Trump when they signed what they called an ‘Appeal to Congress.’ . . . Their ‘Appeal’ is nonsense, but dangerous nonsense. It combines historical ignorance with their own partisan attempt to attack President Trump in a way that would weaken civilian control. If their “Appeal” were granted, it also would further the politicization of the military by plunging Congress into disputes relating to military matters that the Constitution entrusts to the President.”