The series quickly withdrew a shirt that stirred up a strong backlash. But IndyCar has been playing with fire for a while The series quickly withdrew a shirt that stirred up a strong backlash. But IndyCar has been playing with fire for a while This could be the summer of IndyCar. Formula One fatigue is beginning to set in , both globally and among the American audiences who helped fuel the sport’s recent boom. Nascar, for all its national reach in the US and lingering cultural import, remains a