Incoming U.S. President Donald Trump's administration has indicated it will make ample use of economic instruments to support its foreign policy once it takes office in January, including by imposing tariffs on foreign imports. In the case of Mexico, Trump has specifically threatened to increase tariffs on all the country's goods if its government does not rein in migration to the United States and crack down on drug trafficking. Trump, of course, is by no means the first leader who has sought to leverage his country's economic power to extract political concessions. But this tactic is becoming more normalized in international politics, which is why it is worth discussing what economic power and influence consist of within that context. Economic Size and Resource Mobilization Economic size, economic power and international influence are broadly correlated. Countries with larger economies sit on a larger potential resource base.