US President Trump says the US is giving serious consideration to changing the name of Lake Ontario to Lake America in that we don’t expect to doing much business with Ontario any longer

The remark sits within the pattern of escalatory rhetoric around the US-Canada trade dispute, in which Ontario has been the most combative provincial counterparty, having previously threatened and briefly imposed surcharges on electricity exports to US border states before retreating under negotiation. Symbolic gestures of this kind, including prior renaming proposals directed at other shared geography, have tended to function as leverage signalling rather than policy, and have not on their own repriced CAD or cross-border assets. The substantive tell is the phrase about not doing business with Ontario: the transmission channel that matters is not the toponym but whether trade measures follow, since Ontario accounts for a large share of bilateral goods trade and the integrated auto supply chain. In past episodes of this dispute, rhetorical peaks have preceded either tariff announcements or walk-backs within days, so the follow-ons are any formal trade action, the Canadian federal response, and whether energy export measures re-enter the discussion. As it stands this is headline noise characteristic of the negotiating style, with the precedent being that durable FX and equity moves in this channel have come from tariff implementation, not from statements of intent.