Trump rolled out his plans to boost tariffs to match tax rates other countries charge on imports, adding to economic worries as inflation rises.

Reciprocal tariffs refer to tariffs—the taxes charged on imported goods—the U.S. government plans to levy against global trading partners that are equal to the existing tariffs foreign countries have set against American goods. “Very simply, it’s if they charge us, we charge them,” the President said on Sunday during a flight on Air Force One.