According to the 22nd Amendment: "No person shall be elected to the office of the President more than twice, and no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once."

Democratic Vice President Kamala Harris called Donald Trump on Wednesday to congratulate the Republican leader on his U.S. presidential election win, two aides to Harris said.