For communities along the Maine–Canada border, the trade war between Washington and Ottawa is no longer just a diplomatic disagreement. It has become a question of jobs, household expenses, business survival and political accountability.
As Americans vote in the November 3, 2026, midterm elections, President Donald Trump’s tariffs on Canadian goods have emerged as a major issue in Maine’s closely watched U.S. Senate race. The state imported approximately US$4.1 billion in Canadian goods in 2025, with Canadian suppliers supporting industries ranging from energy and forestry to agriculture and construction.
Republican Senator Susan Collins is fighting to retain her seat against Democrat Troy Jackson as businesses confront higher costs, disrupted supply chains and uncertainty over future trade relations. The outcome could influence control of the U.S. Senate, although neither candidate can guarantee an end to the tariff dispute.
Maine’s $4.1 Billion Trade Relationship Makes It Particularly Vulnerable
Maine’s economic relationship with Canada is unusually important compared with most American states. According to trade figures for 2025, Canada supplied approximately 69% of Maine’s merchandise imports, making it the state’s dominant foreign supplier. Canada also purchased roughly US$1.3 billion in goods produced in Maine, representing about 41% of the state’s total merchandise exports. These figures show why changes in Canadian trade policy can have immediate consequences for businesses operating hundreds of kilometres from the international border. From industrial materials and agricultural supplies to energy and seafood, Canadian products have become an integral part of Maine’s economy. Replacing these established supply relationships is not always straightforward, particularly for smaller businesses that depend on specialized products.
The concentration of trade also creates an important imbalance. While Maine relies heavily on Canada for essential imports, Maine accounts for only a small portion of Canada’s overall exports to the United States. That difference gives Canadian trade disruptions potentially greater significance for Maine’s economy than the state’s relatively modest size might suggest. However, the US$4.1 billion import figure does not represent the amount subject to tariffs, since different goods face different trade rules and exemptions. The central concern is that repeated changes to those rules create uncertainty for companies making decisions about purchasing, production and employment. For a manufacturer relying on Canadian materials or a distributor serving local retailers, even a temporary tariff can complicate contracts and increase operating costs.
Canadian Energy Supplies Put Maine’s Heating Bills at the Centre of the Debate
Energy is one of the clearest examples of how Maine’s dependence on Canada extends directly into household finances. A March 2026 briefing from Canada’s diplomatic representatives in the United States identified approximately US$2 billion in Canadian fuel-oil imports to Maine during 2025. Canadian electricity contributed another US$263 million, while natural gas and other gases accounted for approximately US$99 million. These are significant figures for a state where winter heating remains a major household expense. Federal census data show that approximately half of Maine homes used heating oil or similar fuels as their primary source of heat in 2024. Although heat pumps have steadily reduced that dependence, Maine continues to rely on heating oil more heavily than any other state.
That reliance makes changes in energy trade particularly sensitive. A study prepared by the Brattle Group for Maine’s Governor’s Energy Office found that the state was especially exposed to potential tariffs on imported petroleum products because of its dependence on Canadian supplies. The economic consequences can extend beyond residential heating to transportation businesses, farms and manufacturers that purchase fuel throughout the year. Electricity adds another complication, particularly in northern communities with connections to New Brunswick’s power system. The precise effect of any tariff depends on exemptions, energy-market conditions and how much importers pass along to customers. Nevertheless, the possibility of additional costs creates understandable anxiety among households already managing substantial winter expenses. For these voters, the trade dispute is closely connected to monthly bills rather than distant diplomatic negotiations.
Maine’s Forestry Industry Faces Pressure From Both Sides of the Border
Maine’s forestry industry demonstrates why tariffs can be particularly disruptive when Canadian and American businesses operate as parts of the same production network. Canadian trade figures show that Maine imported approximately US$286 million in wood pulp, US$148 million in softwood lumber and US$85 million in paper and paperboard during 2025. Some facilities depend on Canadian raw materials to manufacture products sold in the United States. Twin Rivers Paper provides a particularly striking example. The company operates a pulp mill in Edmundston, New Brunswick, that supplies its paper manufacturing operation across the Saint John River in Madawaska, Maine. This arrangement illustrates how a product manufactured in an American community can depend on materials produced just across the Canadian border.
The consequences of disrupting these arrangements have already become a political issue. Governor Janet Mills has connected the trade dispute to serious problems facing Maine’s forest-products industry, including the temporary layoff of 144 employees at Woodland Pulp in Baileyville during 2025. The Maine International Trade Center also reported that nonpetroleum exports to Canada had fallen approximately 18% through August 2025, with forest products among the hardest-hit categories. Industry representatives have warned that rising costs and unpredictable trade rules complicate decisions about harvesting, production and investment. Tariffs are not the only challenge, as commodity prices, changing demand and longstanding structural pressures also influence the industry. Nevertheless, additional trade barriers place more uncertainty on communities where logging contractors, truck drivers and mill employees depend on the continued movement of wood products.
Maine’s Lobster Industry Escapes One Tariff Threat but Remains Exposed
Maine’s lobster industry has become another powerful example of the economic stakes involved in the dispute. Preliminary figures from the Maine Department of Marine Resources show that lobster harvesters landed approximately 78.8 million pounds in 2025, generating about US$461.4 million in dockside revenue. The fishery supports coastal communities where fishing vessels, processing businesses, equipment suppliers and transportation companies depend on the seasonal catch. Canada plays an important role in that economy, purchasing a substantial share of Maine’s lobster and processing seafood for markets farther abroad. The Maine Lobstermen’s Association has estimated that roughly half of the state’s lobster moves into Canada, meaning changes in cross-border trade conditions can quickly affect demand and the prices fishermen receive.
The industry’s vulnerability became clear in August 2026 when Canada initially included American seafood in a proposed package of retaliatory tariffs. Maine lobster faced the possibility of a 25% import duty just as the important fall fishing season approached. Industry representatives warned that the measure could significantly disrupt trade and reduce income for fishing communities already struggling with operating costs. However, Canada removed fish and seafood from its proposed tariff list on August 26, before the measures took effect in September. The reversal provided important relief and demonstrated that businesses on both sides of the border had reasons to oppose further restrictions. It also exposed the uncertainty created by rapidly changing trade policies. Even when threatened tariffs are withdrawn, seafood dealers and harvesters must continue planning around the possibility of renewed trade tensions.
Fewer Canadian Visitors Have Hurt Maine’s Border Communities and Tourism Businesses
The trade dispute has also affected an industry that does not depend on shipping manufactured goods: tourism. Canadian travellers have historically supported hotels, restaurants, shops and attractions throughout Maine, particularly in communities near the international border and along the state’s southern coastline. However, worsening political relations, tariff disputes and currency pressures contributed to a substantial decline in Canadian travel during 2025. Federal border data showed that land entries into Maine from Canada fell approximately 25% compared with 2024. An analysis by the Maine Center for Economic Policy also found that taxable retail sales in border communities declined by 3.3% between February and August 2025, while restaurant and lodging sales fell by nearly 5%. These figures illustrate how changes in international relations can influence everyday economic activity in smaller communities.
There have been signs of improvement during 2026, although the recovery has been incomplete. U.S. Customs and Border Protection figures showed more than 306,000 travellers entered Maine from Canada in July 2026, an increase from approximately 275,000 in July 2025. However, that remained considerably below the nearly 383,000 recorded in July 2024. Tourism officials have attributed the earlier decline to several pressures, including political tensions and the Canadian dollar’s reduced purchasing power. The consequences are particularly significant for businesses that count on repeat Canadian customers every summer. A hotel owner cannot easily replace decades of established visitor relationships, while restaurants and small retailers often depend on relatively short seasonal periods to generate much of their annual revenue. The tourism downturn has therefore broadened the tariff debate beyond traditional manufacturing and agricultural industries.
Trump’s Last-Minute Tariff Exemptions Offer Relief but Raise New Questions
The political sensitivity of the trade dispute became especially apparent on October 23, 2026, when President Trump announced changes to the list of Canadian products facing additional 50% tariffs. The administration removed certain products from the tariff schedule, including plywood, specialized packaging materials, agricultural machinery and refrigeration equipment. The changes took effect October 30, just four days before the midterm elections. Senator Susan Collins said she had pushed the administration to exempt nine categories of products important to Maine’s blueberry, potato, apple and seaweed producers. Earlier exemptions for Canadian road salt, cement and pulp had also followed her discussions with senior administration officials. For businesses facing expensive imports, the changes offered measurable relief from some of the immediate costs associated with the trade dispute.
However, the administration simultaneously added other Canadian products to the list of goods subject to 50% duties, including certain carpets, paints and manufactured products. The White House defended the adjustments as necessary to protect American commerce while addressing what it considers discriminatory Canadian trade practices. Critics questioned why businesses had been exposed to the additional costs in the first place and whether the exemptions were timed to help Collins politically. The practical importance of the relief was nonetheless clear. Collins previously reported that Frenchville, a small Maine border town, faced approximately US$10,000 in additional road-salt expenses because of tariffs. She also cited a concrete business that warned of US$150,000 in additional monthly costs. Such examples help explain why even relatively narrow tariff exemptions can attract significant attention during a competitive election campaign.
Susan Collins and Troy Jackson Turn the Trade War Into a Fight Over Political Accountability
The economic consequences of the tariff dispute have become central to Maine’s closely contested Senate race between Republican incumbent Susan Collins and Democratic challenger Troy Jackson. Collins, who has represented Maine in the Senate for nearly three decades, is seeking a sixth term while emphasizing her ability to influence federal policy and obtain concessions from the Trump administration. Jackson, a former president of the Maine Senate, argues that Collins has not done enough to challenge trade measures that have harmed businesses and increased costs for residents. Both candidates have criticized broad tariffs on Canada, making their disagreement less about whether the restrictions are economically damaging and more about who bears responsibility for addressing them. The distinction has become particularly important in a state where Canadian trade supports substantial portions of the economy.
That disagreement produced one of the campaign’s most memorable exchanges during an October 6 debate. Collins highlighted her success in securing tariff exemptions for Canadian concrete, pulp and road salt, arguing that the changes would provide meaningful relief to Maine communities. Jackson responded with the remark, “We can’t eat road salt,” suggesting that the exemptions failed to address the broader financial pressures facing households. The exchange captured the competing arguments surrounding the election. Collins maintains that her relationships and seniority in Washington allow her to deliver practical results, while Jackson argues that those accomplishments do not justify the continuation of a wider tariff policy. With healthcare, housing affordability and energy prices also influencing the campaign, voters are weighing broader questions about the economy and political leadership. The trade dispute has become an especially visible example of those concerns.
Maine’s Election Could Influence Future Trade Policy Without Ending the Tariff War
The outcome of Maine’s Senate race could have consequences well beyond the state’s borders, particularly because Democrats are seeking to gain control of the U.S. Senate. A change in congressional leadership could increase political pressure on the Trump administration, strengthen oversight of trade policy and potentially create opportunities for legislation challenging certain tariff powers. However, the president retains significant authority under existing federal laws to modify tariffs without seeking approval for every adjustment. Consequently, neither a Collins victory nor a Jackson victory would automatically remove the restrictions affecting Canadian goods. The distinction is important for Canadian businesses and officials hoping for a more predictable trading relationship. Political changes in Washington could influence negotiations, but they would not necessarily produce immediate economic relief.
There have been tentative signs that negotiations could move forward. On November 1, Trump said the United States and Canada were close to developing a mutually beneficial trade agreement, while Prime Minister Mark Carney described recent discussions as constructive. No final agreement had been announced, and significant disagreements remained over tariffs, market access and broader trade arrangements. The uncertainty is compounded by the 2026 review of the Canada–United States–Mexico Agreement, which remains in force despite Washington declining to renew it in its existing form. For Maine’s businesses, the most important outcome will ultimately be whether the two countries can establish stable, predictable trading conditions. The election may help determine the political environment surrounding those negotiations, but the economic consequences will be measured in business investment, employment, household costs and the strength of relationships that have connected Maine and Canada for generations.
