John Tyler was the 10th VIce-President and the 10th US President. He previously served in both houses of Congress and had been Governor of Virginia. He served under William Henry Harrison. Following the death of Harrison on April 4, 1841, only a month after his inauguration, a short Constitutional crisis arose over the process for succession. Tyler immediately moved into the White House, took the oath of office, and assumed full presidential powers, a precedent that would govern future successions and eventually be codified in the 25th Amendment.
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