How can the U.S. balance its desire for increased security and economic growth with the need to maintain open borders and foster cooperation with Canada and Mexico, particularly in the context of the ongoing debate over the North American Free Trade Agreement (NAFTA) and the proposed border wall, while also addressing the complexities of immigration, trade, and environmental policies that affect all three nations? What role can multilateral institutions and agreements, such as the Organization of American States and the United States-Mexico-Canada Agreement (USMCA), play in facilitating cooperation and resolving disputes among the three countries, and what are the implications for regional stability and economic development? How might the U.S. leverage its relationships with Canada and Mexico to address global challenges, such as climate change, pandemics, and cybersecurity threats, and what opportunities exist for trilateral cooperation in these areas? What are the key areas of convergence and divergence in the strategic interests and priorities of the three countries, and how can these differences be managed to promote a more collaborative and mutually beneficial relationship?