Escalating bilateral trade tensions have shaped expectations around any potential US-Canada agreement to reduce tariffs. After the United States declined to renew the USMCA in its current form during the 2026 joint review and imposed 50 percent Section 338 duties on roughly $20 billion in Canadian goods effective August 22, negotiations collapsed over differences on auto content rules, third-country trade restrictions, and dairy access. Canada responded with matching retaliatory tariffs on September 8 covering steel, aluminum, appliances, and other imports. Both governments have attributed the impasse to the other side’s last-minute demands, with no formal talks reported since late August. Upcoming US midterm elections and any shifts in negotiating positions could influence prospects for renewed diplomacy before year-end.