" On Sunday , after the final ExComm meeting , Jack Kennedy said to his brother that this was the night he should go to the theater , like Lincoln after the Union victory in the Civil War , and Robert -- the subject of assassination having been raised , and with it , of course , the reminder that the Vice President would thereupon become President --- said that ' if he was going to the theater , I would go too , having witnessed the inability of Johnson to make any contribution of any kind during all the conversations . ' In later years , he would recall Johnson's displeasure ' with what we were doing , ' the way , in Bobby's words , that 'he would circulate and whine and complain about our being weak , ' while never making ' any suggestions or recommendations ' himself . The people who ' had participated in all these discussions , ' Robert Kennedy was to say , ' were bright and energetic people . We had perhaps amongst the most able in the country , and if any one of half a dozen of them were President the world would have been very likely plunged in a catastrophic war . ' Lyndon Johnson , he would make clear , was one of that half dozen . Jack Kennedy , as always , was more oblique , but , through the means of another , shorter , list , he also made his feelings clear . Recalls his friend , the journalist Bartlett : ' He said after the Cuban Missile Crisis that there were three men on that Executive Committee that he would be glad to see become President of the United States : McNamara , Dillon , and his brother Bobby . He said that a couple of times . ' Three men whom John F. Kennedy would be happy to have succeed him as President . The Vice President was not one of them .
' You must know as well or better than I President Kennedy's steadily diminishing opinion of him , ' Jacqueline Kennedy would , years after the assassination , write in a private letter to Ted Sorensen . ' As his term progressed , he grew more and more concerned about what would happen if LBJ ever became President . He was truly frightened at the prospect . ' "