WASHINGTON, D.C. (June 25, 2026) – Adding racing royalty to an already historic weekend, the Freedom 250 Grand Prix today announced the addition of the legendary International Race of Champions (IROC), bringing together an all-star lineup of motorsports icons for a special exhibition during the Aug. 22-23 event on the streets of Washington D.C. The IROC Presented by Chevrolet lineup for the Freedom 250 Grand Prix weekend will feature a star-studded collection of motorsports legends, including champions and some of the biggest stars in NASCAR and INDYCAR history. Former NASCAR Cup Series champions Jeff Gordon, Kurt Busch, Bobby Labonte, Rusty...