Sure! I'll post it in "Wonders At The Powers That Be"...
Just to give a brief overview - I think he had peed in the cheerios of the intelligence community. Not invading Cuba, no support during the failed Bay Of Pigs op, his policies and thoughts on things like that made him an enemy. Then there's the whole LBJ losing his VP slot in the upcoming reelection. It's all a part of it, but I truly do believe a lot of it had to do with his relationship or lack thereof with agencies like the CIA.
I'll quote this in the new thread.