No divided loyalties. Keep the requirement, even if the supporters of certain candidates get snippy about it because their guy doesn’t quite fit the bill.
No divided loyalties? Then the best qualified would be naturalized citizens, who have demonstrated absolute loyalty to the U.S. by voluntarily choosing to go through the arduous process of naturalizing. Certainly their loyalty would be a lot less dubious than the loyalty of native-born whose loyalty has never been tested.
Amen.