William McKinley was born on January 29, 1843 and he was the 25th President of the United States. He was one of the sweetest president's we've ever had, doting on his precious wife Ida until his very last day. Sadly, William McKinley's life was cut short by an assassin's bullet and he became the 3rd POTUS to be assassinated. Learn more about the sweet man who always wore a red carnation in the button hole of his jacket.