Republican U.S. president-elect Donald Trump stands with his son Barron (C), wife Melania, son-in-law Jared Kushner and daughter Ivanka Trump at his election night rally in Manhattan, New York, U.S., November 9, 2016.

It will be one of many unusual things about a Donald Trump administration: a long-distance first lady.

Trump will move into the White House after the Jan. 20 inauguration. Breaking with tradition, Melania Trump and 10-year-old son Barron plan to remain in New York City until at least the end of the school year.