IndyCar's Freedom 250 Grand Prix in Washington, DC, attracted 3.282 million viewers, making it the most-watched non-Indy 500 race since 2008.
https://www.foxnews.com/outkick-sports/indycar-freedom-250-grand-prix-spectacle-washington-dc-draws-massive-tv-ratings
https://www.foxnews.com/outkick-sports/indycar-freedom-250-grand-prix-spectacle-washington-dc-draws-massive-tv-ratings