The president with the highest approval rating in world history according to the Guinness Book of World Records

Charles D. B. King
17th President of Liberia
Won the 1927 Liberian presidential election with 234,000 votes.
At that time, the number of Liberian voters was 15,000.
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(It was later listed in the Guinness Book of World Records as the largest number of election frauds in history)