The Senate Appropriations Committee is pushing the Federal Trade Commission to open an anti-trust investigation into trucking fuel cards, spurred by truck stop operators who say concentration in the business hurts their members. The committee put a request for the FTC investigation into that agency’s 2003 funding bill July 24. If the measure becomes law, the FTC would have to report its findings within 180 days. Natso, a trade group representing truck stops, lobbied hard to push the FTC investigation.