Where a U.S. District Court erred in applying a leadership enhancement to a drug middleman, the error was ultimately harmless because the court would have imposed the same 30-year sentence without the enhancement.The 7th U.S. Circuit Court of Appeals affirmed a decision by Chief U.S. District Judge Jane Magnus-Stinson, Southern District of Indiana.Geraldo Colon worked as a middleman in an Arizona-to-Indiana drug-trafficking scheme. Beginning in 2013, Colon purchased kilogram quantities of cocaine and heroin from a Phoenix …