This letter is the latest of many sent to the Trump administration by Tariffs Hurt the Heartland, the national campaign against tariffs supported by more than 150 trade groups representing agriculture, manufacturing, retail and tech industries.But it is significant as U.S.-China trade tensions escalate and comes before a possible meeting between Trump and Chinese President Xi Jinping at the June 28-29 G20 summit in Osaka, Japan. Trump has said he wants to meet Xi there and will decide on whether to extend tariffs to almost all Chinese imports after that.

“We remain concerned about the escalation of tit-for-tat tariffs,” the new letter sent on Thursday said. “Broadly applied tariffs are not an effective tool to change China’s unfair trade practices. Tariffs are taxes paid directl…