WASHINGTON (AP) -- President Donald Trump on Monday imposed 50% tariffs on most Canadian goods, declaring that Canada has unfairly discriminated against American autos, alcohol and dairy products. "If these tariffs proceed, Canada should respond tariff for tariff, dollar for dollar," Ford posted on social media. "The invocation of 338 is the nuclear option for Trump tariffs." The new tariffs carry serious political and economic risks for Trump ahead of the November midterm elections for control of Congress. The Trump administration official said their time together at the game was not a working visit to discuss trade and tariffs.