The Canada–United States–Mexico Agreement (CUSMA/USMCA), in force since 2020, maintains the deep integration of North American energy markets established under NAFTA. The energy chapter eliminates tariffs on crude oil, natural gas, electricity, and petroleum products traded between the three countries — making North American energy trade functionally a single market for pricing and logistics purposes.
However, 2025 brought significant tariff risk. The Trump Administration's executive orders in early 2025 threatened 25% tariffs on Canadian goods, including energy products, triggering intense Canada–US negotiation. Canadian crude oil was ultimately exempted at 10% vs 25% for other goods — but the episode highlighted the political vulnerability of Canada's near-total US market dependence for crude oil, and strengthened the case for Trans Mountain tidewater diversification.