“Those whom the gods wish to destroy first make mad.  Am I mad? I doubt it.”—Samuel J. Byck, January 14, 1974 Of the 45 presidents of the United States, 19 of them have had assassination attempts made on them.  Only four of these assassination attempts have been successful, and all four were accomplished with guns.  Other ways to kill presidents have included a hand grenade, thrown at President George W. Bush in the Republic of Georgia in 2005; an attempt by Argentine anarchists to blow up a train carrying President-Elect Hoover in Argentina in 1928; a letter-bomb sent to President Truman in 1948; and poisons like anthrax mailed to Presidents George W. Bush, Barack Obama, and Donald Trump.  Most every other assassination attempt was made with a gun. But there was one assassination attempt that was different, that was a more elaborate plot.  This was the plot to kill President Richard Nixon on February 22, 1974.   It involved a g...