Which president said "When a country is losing many billions of dollars on trade with virtually every country it does business with, trade wars are good, and easy to win"?

The U.S.-China trade war negatively impacted the economies of both the United States and China. In the United States, it led to higher prices for consumers and financial difficulties for farmers. In China, the trade war contributed to a slowdown in the rate of economic and industrial output growth, which had already been on a decline.