At the 1956 Democratic National Convention in Chicago, former President Truman endorsed Governor Harriman, to Stevenson's dismay, but the blow was softened by former first lady Eleanor Roosevelt's continued enthusiastic support. Stevenson easily defeated Harriman on the first ballot, winning his second Democratic presidential nomination. He was aided by strong support from younger delegates, who were said to form the core of the "New Politics" movement. In a bid to raise enthusiasm for the Democratic ticket, Stevenson made the unusual decision to leave the selection of his running mate up to the convention delegates. This set off a frantic scramble among several prominent Democrats to win the vice-presidential nomination, including Kefauver, Senator Hubert Humphrey, and Senator John F. Kennedy. After fending off a surprisingly strong challenge from Kennedy, Kefauver narrowly won the vice-presidential nomination on the second ballot. In his acceptance speech, Stevenson spoke of his plan for a "New America", which included extending New Deal programs to "areas of education, health, and poverty". He also criticized Republicans for trying to "merchandise candidates like breakfast cereal".