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John Tyler took over after William Harrison died from phemonia. -
He got sick and died from Cholera. Millard Fillmore took over. -
Got assassinated in a theater, watching "Our American Cousin" by John Wilkes Booth and Andrew Johnson had to take over. -
Was assassinated by Charles Guiteau in Potomac Railroad Station in Washington, D.C. Chester A. Arthur took over. -
Teddy Roosevelt took over after after the assassination of McKinley by Leon Czolgosz. -
Calvin Coolidge took over after Warren died from a heart attack. -
Harry S. Truman took over after Franklin's physical health declined and suffered from a cerebral hermitage. -
Was assassinated by Lee Harvey Oswald as he rode in a motorcade through Dealey Plaza in downtown Dallas, Texas. Lyndon B. Johnson took over. -
He resigned from office, as a result of the Watergate scandal. Gerald Ford replaced him.