Are you for or against free trade? What are trade agreements (like NAFTA), and w

Are you for or against free trade? What are trade agreements (like NAFTA), and what impact do they have on international trade? Explain the underlying facts that support free trade and the support used for protectionist trade policies like tariffs and quotas. We sometimes hear people say that you should always “Buy American,” is that economically rational or a flawed assumption?