While this could lead in other directions than Johnson, there's no doubt that a pre-Civil Rights, pre-War on Poverty, pre-Great Society "conservative" Johnson was more to the liking of many Dallasites than the "soft" Kennedy who "made deals with Castro and Kruschev". I don't doubt Johnson could have found some folks that would have cooperated with him for nothing in return.
Do you remember the play MacBird? It was a parody of Macbeth.
LBJ was suspected from the very first of having offed JFK simply because he benefitted and it was on his turf. Don't let the fact that thte Warren Comission didn't look at him make you think he wasn't widely suspected.
So9