Dale Earnhardt Jr. said Tuesday he wants to swap race cars with Graham Rahal, but believes it won't be possible because they drive for rival manufacturers. Both drivers are sponsored by Army National Guard this season. Rahal reached out to Earnhardt on Twitter after Sunday's NASCAR race at Fontana, proposing they swap cars in an exhibition. Only Earnhardt drives a Chevrolet in NASCAR, and Rahal's car in IndyCar is a Honda. More...