Bombardier on Tuesday attempted to draw its Brazilian rival Embraer SA into a hotly contested trade dispute, two days before a U.S. agency will rule on whether duties should be slapped on American sales of the Canadian plane-and-train-maker’s largest jet. The International Trade Commission (ITC), which oversees U.S. trade remedy laws, is to decide on Thursday whether to back a U.S. Commerce Department recommendation to hit Bombardier’s 110-to-130-seat CSeries with a duty of nearly 300 percent on sales to American carriers. The case follows a petition by Boeing Co , the world’s largest maker of jetliners, which argued its business was hurt because Bombardier received illegal government subsidies and dumped the CSeries in the United States through the 2016 sale of 75 jets at “absurdly low prices” to Delta Air Lines .