President-elect of the United States
"The president-elect of the United States is the person who conclusively appears to have won a presidential election in the United States, but has yet to take office as President. The president-elect takes office after the oath of office is administered during the presidential inauguration. If the result of an election is unclear or disputed, no person is normally referred to as president-elect until the dispute is resolved."
https://en.wikipedia.org/wiki/President-elect_of_the_United_States