The Alien Act gave President John Adams the power to deport any foreigner who aroused his suspicions. Making the President nervous, said a member of Congress, “is the new crime.” Jefferson believed the Alien Act had been framed particularly to expel C. F. Volney,* the French historian and philosopher; Pierre Samuel du Pont de Nemours, patriarch of the famous chemical family; and the British scientist Joseph Priestley, the discoverer of oxygen and an intellectual antecedent of James Clerk Maxwell. In Jefferson’s view, these were just the sort of people America needed.