Though the temperatures were at near record highs, nothing could stop fans from enjoying what is known as the 'Greatest Spectacle in Racing'.
The governor says he initially thought about declining, but gave in to a long-held ambition.
Indy 500 winner Dan Wheldon died in a 15-car pileup on October 16 at the Las Vegas Motor Speedway.
A driver meeting today will address the issues surrounding driver Dan Wheldon's death in a crash in Las Vegas.
Carpenter is racing for Indy veteran Sarah Fisher. He is one of only 2 drivers born in Indiana.
Trump cites time and business constraints, possible conflict with presidential run.