List of presidents of the United States by age
The median age upon accession to the presidency is 55 years and 3 months. This is how old Lyndon B. Johnson was at the time of his inauguration. The youngest person to assume the office was Theodore Roosevelt, who became president at the age of , following William McKinley's assassination; the oldest was Donald Trump, who was old at his inauguration. The youngest person to be elected president was John F. Kennedy, at of age on election day; the oldest was Ronald Reagan, who was old at the time of his election to a second term.
1988 United States presidential election
Al Gore, a Senator from Tennessee, also chose to run for the nomination. Turning 40 in 1988, he would have been the youngest man to contest the Presidency on a major party ticket since William Jennings Bryan in 1896, and the youngest president ever if elected, younger than John F. Kennedy at election age and Theodore Roosevelt at age of assumption of office. He eventually became the 45th Vice President of the United States under Bill Clinton, then the Democratic presidential nominee in 2000. Gore was later defeated by George W. Bush, George H.W.'s son, in 2000.