Constitution in 1789, 266 years ago. Passing the amendment would not be worth the long process needed to ratify it. The Framers added the natural-born citizen clause for a reason. They did not want any potential manipulation by foreign countries. Chief Justice John Jay wrote George Washington in 1787, saying the following:
“Permit me to hint, whether it would not be wise and seasonable to provide a strong check to the admission of Foreigners into the administration of our national Government, and to declare expressly that the Command in chief of the American army shall not be given to, nor devolve on, any but a natural born Citizen.”
John Jay’s letter shows his aversion to allowing a naturalized citizen be Commander in Chief of the entire U.S. Army. This is a good reason to add the natural-born citizen clause; the President could manipulate wars to favor his/her home