This article is the Electoral history of John Diefenbaker, the thirteenth Prime Minister of Canada. A Progressive Conservative, he served one term as Prime Minister (1957–1963), defeating Louis St. Laurent. He won three general elections (1957, 1958 and 1962), with one majority government and two minority governments. He lost the 1963 election to Lester Pearson, who succeeded him as prime minister. Diefenbaker led the party one last time in the 1965 election, but was again defeated by Pearson.