Heading into Election Day, Democrat Kamala Harris and Republican Donald Trump were locked in a tight race for the White House, and control of both the U.S. Senate and House was hanging in the balance.

Roosevelt in 1936 (60.2), and Richard Nixon in 1972 (60.7). Only 38% of presidents have won consecutive elections since 1900. The average age of the president at inauguration is 55. A candidate ...