On August 8, 1974, President Richard Nixon delivered his resignation speech to the American public. Moments before this historical event, he was calmly joking around with the TV crew as if this was just any other presser. And then....
"...I have felt it was my duty to persevere, to make every possible effort to complete the term of office to which you elected me. In the past few days, however, it has become evident to me that I no longer have a strong enough political base in the Congress to justify continuing that effort."
(via r/ObscureMedia)