 He also promoted national unity against Quebec separatism, and hosted the 1967 "Confederation of Tomorrow" conference in Toronto in an unsuccessful attempt to achieve an agreement for a new Constitution of Canada.He initially opposed Canadian Medicare when it was proposed, but later endorsed it fully following New Democratic Party (NDP) candidate Kenneth Bolton's upset by-election victory on the issue in the London-area riding of Middlesex South.As a civil libertarian, and a strong believer in the promotion of both official languages, Robarts opened the door to French language education in Ontario schools.