This U. S. president was known as "His Accidency."
Millard Fillmore
John Tyler
Andrew Johnson
Theodore Roosevelt
Gerald Ford
John Tyler. He had been chosen as William Henry Harrison’s vice-president in return for his support of Whig Party power-broker Henry Clay. To the dismay of the party, Harrison died after a month his inauguration – the first president to die in office – and Tyler became president, the first man who hadn’t been elected to the office. He broke with the party when they tried to re-establish a Bank of the United States. Five of his six cabinet members resigned and the Whigs disowned him.