In the past week, Greer defended new tariffs on Canada and announced additional tariffs affecting 60 countries, including major economies such as China and Japan. This escalation follows President Trump’s declaration of ‘significant’ tariffs on the EU in response to a European Commission ruling against Google for antitrust violations. Greer, a 45-year-old lawyer, has emerged as a key advisor within the Trump administration, preparing tariff options for the President, contrasting with the more vocal members of the cabinet.