>>19043060
He still is.
The number of years a president can serve in the White House is spelled out in the 22nd Amendment to the U.S. Constitution, which states "no person shall be elected to the office of the President more than twice." However, if an individual becomes president through the order of succession, that is by taking office after the death, resignation, or ousting of the previous president, they are allowed to serve an additional two years.
…Although Thomas Jefferson favored only two terms, he specifically recognized the fact that situations could arise where a longer tenure would be necessary." https://archive.is/wip/508tX https://www.thoughtco.com/why-presidents-only-serve-two-terms-3367979
In the midst of the Great Depression, Democrat Franklin D. Roosevelt had won election in 1932 and reelection in 1936. In 1940, as Europe was engulfed in a war that threatened to draw in the United States and without a clear Democratic successor who could consolidate the New Deal, Roosevelt (well we now know what really went down with that, don’t we.) . A general disinclination to change leadership amid crisis probably weighed heavily on the minds of voters—much more so than the perceived deep-seated opposition to a third term for a president—and Roosevelt romped to victory in 1940 and again in 1944.
Following on the heels of the establishment of the Hoover Commission and with Republicans winning a majority in Congress after the 1946 elections, they introduced an amendment to limit the president to two terms. The amendment caps the service of a president at10 years. https://archive.is/QGXip
https://www.britannica.com/topic/Twenty-second-Amendment