President Joe Biden stated at his end of first year press conference yesterday, that he planned to run for a second term in 2024, and that Kamala Harris would again be his running mate.
That is to be expected at this time, but by early 2023, Biden will need to make a final decision on running, so as to open the race to alternative choices if he announces he will retire.
The concept that a President must seek reelection was not the case with three Presidents, who decided not to run–James K. Polk in 1848, James Buchanan in 1860, and Rutherford Hayes in 1880. But Polk, despite not running for another term, is considered to have accomplished his goals, and as it turns out, his health was not good, and he died 105 days after leaving office in 1849.
Buchanan and Hayes are not considered to have had successful terms, and they may have sensed that they could not win reelection.
Other one term Presidents, such as Benjamin Harrison and Herbert Hoover, had horrible depressions to deal with, helping to cause their defeats in 1892 and 1932, and William Howard Taft had a split in his party with former President Theodore Roosevelt, which doomed his campaign for reelection in 1912.
Gerald Ford was a special situation, having not been elected, succeeding Richard Nixon, and having a bad economy, which doomed his desire for election to a full term in 1976, although he is considered in a kind manner at this point, having worked to unite America after the Watergate Scandal and resignation of Nixon.
But the two most recent Presidents defeated for reelection, before Donald Trump, had real accomplishments in office, although they were unable to win a second term, Jimmy Carter in 1980, and George H. W. Bush in 1992.
Clearly, all Presidents since Rutherford Hayes in 1880, who have survived a term, have attempted to be reelected, but since Biden will be 82 years old weeks after the Presidential Election of 2024, he might decide not to run, or his health might be such that he is told he should not run.