Sen. Susan Collins (R-Maine) said the Trump administration has underestimated how its escalating trade dispute with Canada is affecting Maine families, small manufacturers, farmers and municipalities. She said Washington treats tariffs as a macroeconomic issue while their local effects are considerable, and has pressed Vice President JD Vance and U.S. Trade Representative Jamieson Greer to reopen negotiations. The collapse of U.S.-Canada talks triggered 50% U.S. tariffs on roughly $20 billion of Canadian exports, followed by Canadian retaliation on $20 billion of U.S. goods. Collins said Maine imports about $2 billion in non-petroleum Canadian goods annually and warned that roughly $170 million of state exports could face retaliation. Washington agreed to exempt road salt and cement after Collins raised local cost pressures, but significant tariffs remain. Canada’s retaliatory measures took effect Sept. 8 on dairy, paper, steel and auto parts, while President Trump has threatened additional auto tariffs. The dispute is also creating political pressure, with a Reuters/Ipsos poll finding 57% of Americans opposed additional tariffs on Canadian goods and 68% favoring compromise.