"Meanwhile, the Democrats grew divided between supporters of Johnson's foreign policy and those who had embraced Robert Kennedy's antiwar position. This split played out in a particularly disruptive manner at the Democratic convention in Chicago. With Kennedy tragically gone, the traditional party organization stepped into the breach. The party insiders who dominated on the convention floor favored Vice President Hubert Humphrey, but Humphrey was deeply unpopular among antiwar delegates because of his association with President Johnson's Vietnam policies. Moreover, Humphrey had not run in a single primary. His campaign, as one set of analysts put it, was limited to "party leaders, union bosses, and other insiders." Yet, with the backing of the party regulars, including the machine of powerful Chicago mayor Richard Daley, he won the nomination on the first ballot."