Tariffs Tariff Negotiations USMCA Economic Impact Economic Sanctions Economic Cooperation Tariff Implications Tariff Policies Tariff Retaliation Tariff Responses Energy Trade Retaliatory Tariffs NAFTA CUSMA Tariff Disputes NAFTA/USMCA Border Security Economic Policy Economic Alliances Economic Policies Tariff Exemptions Tariffs Impact G7 and G20 Cooperation U.S.-Mexico-Canada Agreement North American Free Trade Agreement Fentanyl Trafficking United States-Mexico-Canada Agreement Tariff Effects Canada-U.S.-Mexico Agreement Tariff Impacts Free Trade Agreements Diplomatic Relations Energy Dependence Import Policies Energy Cooperation Transportation Policy Keystone XL Pipeline Import-Export Dynamics Diplomatic Efforts Border Reinforcement