William Henry Harrison – IQ 146.3
William Henry Harrison was elected as the president of the US at the ripe old age of 67. Aside from being one of the oldest men to take command of the White House, he was also the first US president to die in office. His service lasted only 31 days before he succumbed to complications of pneumonia.
Did you know that the president with the shortest term in office was the man who delivered the longest inaugural address? His epic one hour and 45-minute speech on a freezing morning in March 1841 was, in fact, the catalyst that triggered his fatal bout of pneumonia.