W. Averell Harriman, who was backed by former President Harry S. Truman, challenged Stevenson for the nomination. However, Stevenson's delegate lead was much too large for Harriman to overcome, and Stevenson won on the first ballot. The roll call, as reported in Richard C. Bain and Judith H. Parris, Convention Decisions and Voting Records, pp. 294–298: Vice-presidential nomination The highlight of the 1956 Democratic Convention came when Stevenson, to create excitement for the ticket, made the surprise announcement that the convention's delegates would choose his running mate. This set off a desperate scramble among several candidates to win the nomination. Potential vice-presidential candidates had only one hectic day to campaign among the delegates before the voting began. The two leading contenders were Senator Kefauver, who retained the support of his primary delegates, and Senator John F. Kennedy from Massachusetts, who was not well known at the time. Although Stevenson privately preferred Senator Kennedy to be his running mate, he did not attempt to influence the balloting for Kennedy in any way. Kennedy surprised the experts by surging into the lead on the second ballot; at one point, he was only 15 votes shy of winning. However, a number of states then left their "favorite son" candidates and switched to Kefauver, giving him the victory. Kennedy then gave a gracious concession speech. The defeat was a boost for Kennedy's long-term presidential chances: as a serious contender, he gained favorable national publicity, yet by losing to Kefauver he avoided blame for Stevenson's loss to Eisenhower in November. The vote totals in the vice-presidential balloting are recorded in the following table, which also comes from Bain & Parris. General election Campaign Stevenson campaigned hard against Eisenhower, with television ads for the first time being the dominant medium for both sides. Eisenhower's 1952 election victory had been due in large part to winning the female vote; hence, during this campaign there was a plethora of "housewife"-focused ads. Some commentators at the time also argued that television's new prominence was a major factor in Eisenhower's decision to run for a second term at the age of 66, considering his weak health after the heart attack in 1955. Television allowed Eisenhower to reach people across the country without enduring the strain of repeated coast-to-coast travel, making a national campaign more feasible. Stevenson proposed significant increases in government spending for social programs and treaties with the Soviet