Trade war with Canada hits key Senate battleground states as tariffs rise

According to a study by the Advancing American Freedom Foundation, six pivotal states in the 2026 Senate races—Iowa, Maine, Michigan, New Hampshire, Ohio and Texas—accounted for $188 billion in trade with Canada, representing over 25% of the $674 billion total bilateral flow. The same analysis found that Iowa, Maine, Michigan, Minnesota, Ohio and New Hampshire each rely on Canada for at least ten percent of their annual goods imports.

In response to the escalating dispute, the Canadian government introduced retaliatory tariffs ranging from 15% to 50% on more than $20 billion of American products, while the United States imposed 50% duties on an estimated $28 billion of Canadian goods. Republican senators defending seats in Iowa, Maine, Ohio and Texas, as well as those seeking to flip Minnesota and New Hampshire, are confronting the political fallout, with Senator Susan Collins voicing concerns about higher costs for Maine businesses. Democrats need to gain four seats to retake Senate control, making the trade conflict a potential factor in the tightly contested races.