The Unionist Party of Canada is a now-defunct political party formed by the former Prime Minister Sir Robert Borden in the first world war. Borden was a member of the Conservative Party but the new party was formed as a coalition party of both Liberals and Conservatives to implement the deeply controversial measure of conscription. (Conscription was extremely unpopular in Quebec, but quite popular in the anglophile provinces.) Canada had two Prime Ministers from the Unionist Party: Sir Robert Borden and Arthur Meighen.