I’m thinking Darrell Issa
You’re right. Serves me right for not writing down anything about the pic.
Here is the caption for a different shot of the same group, that day:
BAKERSFIELD, CA - OCTOBER 3, 2004: (L-R) Mary Bono, Republican gubernatorial candidate Arnold Schwarzenegger, former New York City mayor Rudy Giuliani and Rep. Darrell Issa (R-CA) raise their arms during a rally October 3, 2003 in Bakersfield, California. Schwarzenegger continues on his four-day bus tour through California that began in San Diego and ends in Sacramento. There are six buses in the tour, all named after Schwarzenegger films.