The convention was held following the announced retirement of Lester B. Pearson, who was a much respected party leader and Prime Minister of Canada, but who had failed to win a majority government in two attempts. Eight high-profile cabinet ministers entered the race, but by the time the convention began on April 3 the charismatic Trudeau had emerged as the front runner. He was strongly opposed by the party's right wing, but this faction was divided between former Minister of Trade and Commerce Robert Winters and Minister of Transport Paul Hellyer, and failed to mount a united opposition. Trudeau won the leadership with the support of 51% delegates on the fourth ballot of the convention.