Diefenbaker quietly sought the Conservative nomination for the federal riding of Lake Centre, but was unwilling to risk a divisive intra-party squabble. In what Diefenbaker biographer Smith states "appears to have been an elaborate and prearranged charade", Diefenbaker attended the nominating convention as keynote speaker, but withdrew when his name was proposed, stating a local man should be selected. The winner among the six remaining candidates, riding president W. B. Kelly, declined the nomination, urging the delegates to select Diefenbaker, which they promptly did. Mackenzie King called a general election for March 25, 1940. The incumbent in Lake Centre was the Deputy Speaker of the House of Commons, Liberal John Frederick Johnston. Diefenbaker campaigned aggressively in Lake Centre, holding 63 rallies and seeking to appeal to members of all parties. On election day, he defeated Johnston by 280 votes on what was otherwise a disastrous day for the Conservatives, who won only 39 seats out of the 245 in the House of Commons—their lowest total since Confederation.