Diefenbaker continued to lead the Progressive Conservatives, again as Leader of the Opposition. In November 1963, upon hearing of Kennedy's assassination, the Tory leader addressed the Commons, stating, "A beacon of freedom has gone. Whatever the disagreement, to me he stood as the embodiment of freedom, not only in his own country, but throughout the world." In the 1964 Great Canadian Flag Debate, Diefenbaker led the unsuccessful opposition to the Maple Leaf flag, which the Liberals pushed for after the rejection of Pearson's preferred design showing three maple leaves. Diefenbaker preferred the existing Canadian Red Ensign or another design showing symbols of the nation's heritage. He dismissed the adopted design, with a single red maple leaf and two red bars, as "a flag that Peruvians might salute", a reference to Peru's red-white-red tricolour. At the request of Quebec Tory Léon Balcer, who feared devastating PC losses in the province at the next election, Pearson imposed closure, and the bill passed with the majority singing "O Canada" as Diefenbaker led the dissenters in "God Save the Queen".