FDR
Since Franklin D. Roosevelt, no US President has served more than eight years.
George Washington served as a president for eight years.
A president serves four years in a term. Theodore Roosevelt was elected to two terms, so therefore, he served as president for eight years.
James Madison served as president for eight years.
George H.W. Bush served as the 41st President for only four years from 1989 to 1993. However, he served as vice president under Ronald Reagan for the eight years leading up to his own presidency.
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Grant took office on March 4,1869 and served for eight years.
Vice President Tompkins served the full eight years of James Monroe's presidency.
John Adams served for eight years as the first Vice President (under George Washington) .He then went on to become the second US president.
Dwight Eisenhower was a Republican who served eight of these years, from 1953 to 1961.
Dwight D. Eisenhower served two 4-terms for a total of 8 years as President of the United States of America, from 1953 January 20 to 1961 January 20. This was the only political office that Eisenhower held in his lifetime, as he came from a military background, famously acting as the Supreme Allied Commander of Allied Forces in Europe after WWII. Before becoming the 34th president, Eisenhower was a five-star general who served during World War 2.