特朗普签署行政令将安大略湖更名为“美国湖”

当地时间27日，美国总统特朗普签署一项行政命令，将安大略湖在美国境内的名称改为“美国湖”，并称该命令“立即生效”23。该命令更新了美国地理命名服务中的湖泊名称3。安大略湖是北美洲五大湖之一，位于美国与加拿大交界处，湖区北接加拿大安大略省，南邻美国纽约州2。对此，加拿大总理马克·卡尼及多名官员拒绝承认这一更名1。

加拿大总理卡尼在社交媒体发文指出，安大略湖本意为“秀丽、广袤之湖”，这一名称已有400多年历史，远早于加拿大联邦成立和美国《独立宣言》签署2。他表示：“加拿大人明白，这个湖叫安大略湖，‘今天如此，永远如此’。”2 加拿大工业部长梅拉妮·乔利也表态称：“我们将永远称其为安大略湖。”1

此次更名发生在美加贸易战加剧、两国贸易谈判于周五深夜最后一刻破裂的背景下13。在关税问题上，美国已对价值200亿美元（280亿加元）的加拿大商品加征50%的关税1。加拿大总理卡尼宣布将实施“等额”报复性关税措施1，并于8月22日宣布该措施将从9月8日起实施2。此外，特朗普在8月24日表示，将从2027年1月1日起，把对加拿大汽车、汽车零部件和钢铁等产品的进口关税提高至50%2。特朗普曾于2025年签署过类似命令，将墨西哥湾更名为“美国湾”，引发了类似争议12。

U.S. President Donald Trump signed an executive order on August 27, 2026, renaming Lake Ontario to "Lake America" within the United States, with the change taking effect immediately 23. The directive updates the lake's designation in the U.S. geographic naming service 3. Lake Ontario, one of the North American Great Lakes, is situated on the border between the United States and Canada, bordered by the Canadian province of Ontario to the north and the U.S. state of New York to the south 2.

The renaming comes amid an escalating trade war between the two countries, which followed the collapse of trade talks late on a Friday night 13. On August 24, Trump announced that import tariffs on Canadian automobiles, auto parts, and steel would be raised to 50% starting January 1, 2027, targeting $20 billion (C$28 billion) worth of Canadian goods 12. In response to the trade tensions, Canadian Prime Minister Mark Carney announced on August 22 that Canada would implement "dollar for dollar" counter tariffs beginning September 8 12.

Canadian officials have firmly rejected the lake's renaming, emphasizing that the name "Lake Ontario" has a history spanning more than 400 years, predating both the formation of the Canadian Confederation and the signing of the U.S. Declaration of Independence 12. Taking to social media, Carney explained that the name translates to a "beautiful, vast lake" and declared, "Canadians know that this lake is called Lake Ontario, 'today and forever'" 2. Echoing this defiance, Canadian Industry Minister Melanie Joly stated, "We'll always call it Lake Ontario" 1. This is not the first time Trump has attempted to alter geographic names; he signed a similar order in 2025 to change the Gulf of Mexico to the Gulf of America 12.