The 1963 Canadian federal election was held on April 8, 1963 to elect members of the House of Commons of Canada of the 26th Parliament of Canada. It resulted in the defeat of the minority Progressive Conservative (Tory) government of Prime Minister John Diefenbaker, with the Liberals returning to power for the first time in 6 years, where they would remain for twenty of the next twenty-one years (winning every election except the 1979 election until their landslide defeat in 1984). For the Social Credit Party, despite getting their highest ever share of the vote, the party lost 6 seats compared to its high-water mark in 1962. Overview During the Tories' last year in office, members of the Diefenbaker Cabinet attempted to remove him from the leadership of the party, and therefore from the Prime Minister's office. In addition to concern within the party about Diefenbaker's mercurial style of leadership, there had been a serious split in party ranks over the issue of stationing American nuclear missiles (see Bomarc missile) on Canadian soil for protection from possible Soviet attack. Diefenbaker and his allies opposed this proposal, while many other Conservatives and the opposition Liberal Party were in favour. Minister of National Defence Douglas Harkness resigned from Cabinet on February 4, 1963, because of Diefenbaker's opposition to accepting the missiles. When it turned out that nearly half of his cabinet was also prepared to resign over the issue, Diefenbaker announced that he himself would resign with immediate effect and recommend that the Governor General appoint Minister of Justice Donald Fleming as acting Prime Minister pending a new Progressive Conservative leadership convention. Diefenbaker's allies persuaded him not to go through with the resignation. However, the furore caused by the cabinet split and Diefenbaker's rejecting a proposed deal with the Social Credit Party, whose support they had been relying on to remain in power since the previous election, resulted in Diefenbaker's government losing two non-confidence motions the next day and consequently falling. The Liberal Party of Lester Pearson were twenty percentage points ahead of the Tories when the election was called, and it looked inevitable that they would form a majority government. Their campaign began to falter however, firstly when Pearson was struck down with a bout of ill-health which precluded him from actively campaigning, and more importantly when the U.S. Department of Defense leaked a document detailing the proposed missile defences (which