Tip O'Neill was a representative from Kennedy's home state of Massachusetts at that time, and he recalled that Johnson approached him at the convention and said, "Tip, I know you have to support Kennedy at the start, but I'd like to have you with me on the second ballot."O'Neill replied, "Senator, there's not going to be any second ballot."[73]

Vice-presidential nomination
According to Kennedy's Special Counsel Myer Feldman and Kennedy himself, it is impossible to reconstruct the precise manner in which Johnson's vice-presidential nomination ultimately took place. Kennedy did realize that he could not be elected without the support of traditional Southern Democrats, most of whom had backed Johnson; nevertheless, labor leaders were unanimous in their opposition to Johnson. AFL-CIO President George Meany called Johnson "the arch-foe of labor", while Illinois AFL-CIO President Reuben Soderstrom asserted Kennedy had "made chumps out of leaders of the American labor movement".[74][75] After much back and forth with party leaders and others on the matter, Kennedy did offer Johnson the vice-presidential nomination at the Los Angeles Biltmore Hotel at 10:15 am on July 14, the morning after he was nominated, and Johnson accepted. 