President Trump's tariffs on Canadian imports assert long-overdue leverage to correct decades of unbalanced trade that have hollowed out American manufacturing, yet the swift opposition from Republicans like Senator Susan Collins reveals a domestic weakness that Canada is already exploiting. This division hands our neighbors an opening to divide and conquer rather than forcing genuine reciprocity. The Constitution empowers the federal government to regulate foreign commerce for the benefit of the nation as a whole, not to shield individual states from the costs of enforcing fair terms. True sovereignty requires rejecting the dependencies that bind us to foreign suppliers and instead prioritizing policies that strengthen domestic production under a system of ordered liberty. Collins and her ilk forget that limited government at home begins with strength abroad. Conservatives must back the resolve to finish what these tariffs started.