A body of water that has borne an Indigenous name for centuries has become the latest terrain in a geopolitical contest between neighboring nations. President Trump's unilateral renaming of Lake Ontario to 'Lake America' — now reflected in Google Maps for American users — is less a cartographic act than a declaration of identity, echoing his earlier rechristening of the Gulf of Mexico and arriving amid a deepening trade war with Canada. The map, long understood as a neutral record of the world, has become a mirror of political will, showing different truths to different eyes depending on which