In 1980, Reagan won the Republican presidential nomination and defeated the incumbent president, Jimmy Carter. At of age at the time of his first inauguration, Reagan was the oldest person to assume the U.S. presidency, a distinction he held until 2017, when Donald Trump was inaugurated at age . Reagan faced former vice president Walter Mondale when he ran for re-election in 1984 and defeated him, winning the most electoral votes of any U.S. president, 525, or 97.6% of the 538 votes in the Electoral College. It was the second-most lopsided presidential election in modern U.S. history after Franklin D. Roosevelt's 1936 victory over Alf Landon, in which he won 98.5%, or 523, of the (then-total) 531 electoral votes.