Joe Biden’s choice to step aside has resurrected discussion of Lyndon Johnson, who stunned Americans by doing the same thing on March 31, 1968. In both cases, the Presidents opened the door for their Vice Presidents to be the Democratic nominee for President. [time-brightcove not-tgx=”true”] And yet, because Johnson never relinquished party leadership behind the scenes, the Democratic National Convention resulted in chaos and division, not party unity.