History is against you on that one.
Not so much.
Calvin Coolidge
Served the remaining 1 year, 7 months, and 2 days of Harding's term. Served a full term. Did not seek renomination.
Richard Nixon
Served one full term. Resigned 1 year, 6 months, and 20 days into his second term.
Lyndon B. Johnson
Served the remaining 1 year, 1 month, and 29 days of Kennedy's term. Served a full term. Withdrew from the race for renomination.
William McKinley
Served one full term. Assassinated 6 months and 2 days into his second term, dying 8 days later, 6 months and 10 days into that term.
Abraham Lincoln
Served one full term. Assassinated 1 month and 11 days into his second term.
John Quincy Adams
Served one full term. Lost reelection.
Martin Van Buren
Served one full term. Lost reelection in 1840. In 1844, attempted, but failed, to be renominated for a nonconsecutive term by his party. In 1848, ran (and lost) on the Free Soil Party platform.
James K. Polk
Served one full term. Did not seek a second term.
Franklin Pierce
Served one full term. Lost renomination.
James Buchanan
Served one full term. Did not seek a second term.
Rutherford B. Hayes
Served one full term. Did not seek a second term.
Benjamin Harrison
Served one full term. Lost reelection.
William Howard Taft
Served one full term. Lost reelection.
Herbert Hoover
Served one full term. Lost reelection.
Jimmy Carter
Served one full term. Lost reelection.
George H. W. Bush
Served one full term. Lost reelection.
John Adams
Served one full term. Lost reelection.
John Tyler
Served the remaining 3 years and 11 months of William H. Harrison's term. Lost nomination for a full term.
Andrew Johnson
Served the remaining 3 years, 10 months, and 17 days of Lincoln's second term. Lost nomination for a full term.
Chester A. Arthur
Served the remaining 3 years, 5 months, and 13 days of Garfield's term. Lost nomination for a full term.
John F. Kennedy
Assassinated 2 years, 10 months, and 2 days into his term.
Millard Fillmore
Served the remaining 2 years, 7 months, and 23 days of Taylor's term. Lost nomination for a full term in 1852. Lost election in 1856.
Gerald Ford
Served the remaining 2 years, 5 months, and 11 days of Nixon's second term. Lost election for a full term.
Warren G. Harding
Died 2 years, 4 months, and 29 days into his term.
Zachary Taylor
Died 1 year, 4 months, and 5 days into his term.
James A. Garfield
Assassinated 3 months and 28 days after taking office, dying 79 days later, 6 months and 15 days into his term.
Donald Trump
Incumbent, serving his first term of office.
William Henry Harrison
Died 31 days into his term.