So we know the Chicago Mafia helped JFK win Illinois and therefore beat Nixon in 1960. This is established fact.
There is a credible theory that it was the Chicago and Mafia and the CIA who plotted to kill JFK in 1963.
**What specific action did JFK take in the interim to motivate the Mafia to turn on him? **
I can think of several possible answers, but haven't researched JFK as deeply as many on here and I'd love to hear your well-reasoned opinions.
Prior to the election, JFK refused to debate LBJ.
That was when the die was cast.
From what I know, Bobby Kennedy started nailing the MOB in the 1950s. So with a little encouragement from his brother, he was good to go.
LBJ probably didn't give a shit either way.