As historian Joseph Levitt notes: Since the Treaty of Washington in 1871, when it first de facto recognized the new Dominion of Canada, the United States has never suggested or promoted an annexationist movement in Canada.
历史学家约瑟夫·莱维特指出，“自1871年《华盛顿条约（英语：Treaty of Washington (1871)）》率先實際承认新自治领加拿大以來，美国政府未曾提议或推动加拿大兼并运动。