25th U.S. President (1897-1901).
Due to financial troubles, he was forced to work as a postal clerk and teacher rather than return to college.
He led the US to victory in just 100 days in the Spanish-American War.
His father, William McKinley, Sr., was a manufacturer and pioneer in the iron industry.
He was the twenty-fifth U.S. President; John Adams was the second U.S. President.