William Henry Harrison died in 1841 after just one month in the White House; his was the shortest term any US president has ever served.
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William Henry Harrison was an American military officer and politician who served as the ninth president of the United States in 1841. He died of either typhoid, pneumonia, or paratyphoid fever 31 days into his term, becoming the first president to die in office and the shortest-serving U.S. president in history. His death sparked a brief constitutional crisis regarding succession to the presidency.

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