Honda won the most votes in the jungle primary in June, and has establishment and progressive backing, but Khanna has raised a lot of money and has tapped the resources of top Obama 2012 field campaign architect Jeremy Bird and his 270 Strategies consulting firm to develop his field campaign.

The race is nasty, with Khanna accusing Honda of skipping out on his duties as a member of Congress and Honda backers accusing Khanna of being a Republican.

The GOP is actually playing an outsize role in the race, with Honda touting the endorsement of the Republican he defeated in 2000 to take the Silicon Valley seat.