Oswald almost killed Nixon. Nixon was also in Dallas the same time Kennedy was. Oswald's wife kept him from taking his pistol and going to kill Nixon the day before Kennedy was shot.
Torqumada
I was going to ask, "Really? Cite?"
Because I've got Manchester's 'Death Of A President' laying around somewhere, and I don't remember reading this anywhere in the main points of the
official version account of Oswald's actions as relayed by the Kennedys' official 'Dallas historian'.
But--the miracle of Google Book search tells me that Marina Oswald, after her first series of interrogations, after her first appearance before the Warren Commission, all of a sudden remembered her late husband knew the former vice president was in town for a Studebaker dealers' convention that fateful day. And he
threatened to kill Nixon. According to Marina all that time later in the middle of 1964. Right off the top of her head.
This is one reason WIs about this particular subject are... problematic.