As news broke of President Donald Trump firing FBI Director James Comey, many started tweeting that Nixon was the only other president to fire an FBI director.

So the Richard Nixon Library took the opportunity to correct the record with a "FUN FACT." Nixon never fired the director of the FBI.
FUN FACT: President Nixon never fired the Director of the FBI #FBIDirector #notNixonian
The false claim spread like wildfire on the web.
What happened after Nixon fired his FBI director? Historians?
Nixon also fired the FBI director who was in charge of the Watergate investigation at the time. History is repeating itself. #JamesComey
But in what was dubbed the "Saturday Night Massacre" amid the Watergate scandal, Richard Nixon actually dismissed the special prosecutor, Archibald Cox. Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus then resigned.

But at least Twitter took the time to enjoy the trolling.
The Nixon Library is trolling. https://t.co/j2JSwXCTyJ
This is a hell of a subtweet https://t.co/ix6mefqajp