U.S. Trade Representative Jamieson Greer arrives for the G7 trade meeting in Paris, May 6. AP-Yonhap

WASHINGTON — U.S. Trade Representative (USTR) Jamieson Greer cited Korea's rise as a "steelmaking powerhouse" in a recent article defending President Donald Trump's tariff policy and criticizing foreign government intervention.

Greer released the article in the June issue of the International Monetary Fund's Finance and Development Magazine on Friday, as his office is carrying out investigations into Korea, China, Japan and other trading partners to uncover "unfair trade practices," which could result in new tariffs.

"How can it be that the United States, with the most bountiful cropland in the world, runs a trade deficit in agriculture? How can it be that Korea — with limited energy resources, no coal, and no iron ore — became a steelmaking powerhouse?" he wrote in the article.

"Economic interventions by countries have rigged the global economy in ways that persistently put some countries in deficit and others in surplus. This is not healthy for the countries in either category," he said.