In August 1956, Drew fell ill and many within the party urged him to step aside, feeling that the Progressive Conservatives needed vigorous leadership with an election likely within a year. He resigned in late September, and Diefenbaker immediately announced his candidacy for the leadership. A number of Progressive Conservative leaders, principally from the Ontario wing of the party, started a "Stop Diefenbaker" movement, and wooed University of Toronto president Sidney Smith as a possible candidate. When Smith declined, they could find no one of comparable stature to stand against Diefenbaker. The only serious competition to Diefenbaker came from Donald Fleming, who had finished third at the previous leadership convention, but his having repeatedly criticised Drew's leadership ensured that the critical Ontario delegates would not back Fleming, all but destroying his chances of victory. At the leadership convention in Ottawa in December 1956, Diefenbaker won on the first ballot, and the dissidents reconciled themselves to his victory. After all, they reasoned, Diefenbaker was now 61 and unlikely to lead the party for more than one general election, an election they believed would be won by the Liberals regardless of who led the Tories.