SPRINGFIELD — Farmers and business owners in Illinois could soon see themselves in the middle of the trade dispute with China, U.S. Sen. Richard J. Durbin said.Durbin visited Springfield Friday to push Congress to pass the new farm bill and tout the success of the Springfield YMCA’s summer food program. The program, which provides meals for low-income children, is funded by the U.S. Agriculture Department.But hours before Durbin’s visit, the White House announced a 25 percent tariff against China on $50 …