Commerce Secretary Howard Lutnick claimed President Donald Trump has the upper hand in tariffs against China because the U.S. buys more of its products than the Chinese buy American.

Lutnick’s analysis comes weeks after China filed a lawsuit against the U.S. with the World Trade Organization over its 10% tariff. Additionally, it issued its own 10% tariff on U.S. goods. According to Lutnick, the tariff battle comes down to the flow of fentanyl from China to the U.S.