Trade Wars: How Countries Use Tariffs and Resources to Pressure Neighbors

Trade disputes are a constant reality on the global stage. When negotiations break down or a country feels its interests are at risk, it can resort to a series of economic strategies to pressure its counterpart. The recent confrontation between Canada and the United States offers a practical case study to understand how these tools work.

The Canadian government, led by Prime Minister Mark Carney, announced in August 2026 a series of tariffs ranging from 15% to 50% on American products. This measure was a direct response to new duties that the Donald Trump administration imposed on Canadian goods. The situation, involving over $20 billion in levies, shows us several ways a country can defend its economy. But beyond this news, what methods do countries have to exert trade pressure?

How Countries Exert Economic Pressure

Nations have various tools to influence their partners' trade decisions, especially when direct negotiations fail. These strategies aim to impact the other country's economy at sensitive points, to force a change in stance.

1. Imposing Selective Tariffs

One of the most direct and common tools is the imposition of tariffs or duties on specific products from a country. Canada, for example, announced taxes on U.S. steel, dairy products, home appliances, agricultural equipment, paper and pulp, and electronics, as detailed by Canadian Finance Minister François Philippe Champagne to El País. This strategy seeks to make the rival country's products more expensive in the domestic market, making them less competitive and directly affecting their exporting industries.

The key to these tariffs is that they are selective, meaning they target sectors that are important to the economy of the country being pressured, or that are concentrated in politically sensitive regions. In this way, economic impact translates into internal political pressure.

2. Restricting Access to Key Resources

Some countries have the advantage of being significant suppliers of essential raw materials or energy to others. Canada, for example, is the main supplier of natural gas and electricity to the United States, and provides about 60% of its crude oil, as reported by the BBC. Prime Minister Carney even suggested that Canada could stop sending that energy, an option that, although not included in the initial countermeasures, has not been ruled out.

Ontario Premier Doug Ford went further by mentioning the possibility of applying a 25% energy surcharge on electricity exports to states like Michigan, Minnesota, and New York. Additionally, Canada is the world's largest supplier of potash, a key ingredient for fertilizers, and holds significant reserves of critical minerals such as lithium, nickel, and graphite. Restricting access to these resources can have a significant impact on the dependent country's agriculture, industry, and energy.

This reminds us of the importance of stable resource supply, a topic we also analyzed in our note on economic sanctions and the Strait of Hormuz.

3. Driving Boycotts and Consumer Actions

The purchasing power of citizens and decisions at the provincial or state level can also be a tool for pressure. In the dispute between Canada and the United States, Canadian provinces banned the sale of American alcohol in their liquor stores. This measure led to a 78% drop in U.S. wine exports to Canada, representing a loss of $357 million, according to government data cited by the BBC. Exports of spirits also fell by more than 70%.

These types of boycotts, whether driven by subnational governments or by citizens themselves (such as the observed abstention from traveling to the United States), demonstrate how consumer decisions can have a considerable economic impact. It is a way to exert pressure from below, directly affecting specific companies and sectors of the rival country.

4. Leveraging Trade Interdependence

Modern economies are highly interconnected. The United States and Canada, for example, exchange goods and services worth about $900 billion annually, according to El País. This interdependence means that while one country may depend on the other for its exports, the other also depends on it as a market.

Canada is the main customer for 26 U.S. states and among the top three for 45 of the 50 states, as noted by the BBC. This means that Canada's actions not only affect the overall U.S. economy but can disproportionately impact specific regions or industries within the United States. Recognizing and using this interdependence to pinpoint where and how the other country's measures would cause the most harm is a subtle but potent strategy.

Why it matters

Understanding these strategies is key to seeing how the global economy moves beyond formal agreements. Trade disputes not only affect governments but have a real impact on businesses, workers, and consumers. Knowing these tools helps us better understand the news and decisions made by world leaders, as well as the potential consequences for our daily lives and the stability of international supply chains.