LBJ had true faith in LBJ and no other. However, for some reason he developed a liking for his former foe John G. Tower.
Considering LBJ had a heart attack in the 1950s, I question just how ambitious he truly would have been at that point. This is the same guy that chose to step down rather than run for re-election.
Of course I suppose that’s more fodder, because some could say that LBJ was offered a deal to step down, and not let the truth of his involvement in the assassination to come out in exchange.