Daily Kos led me to some other interesting information on my congressional district, represented by the crook Gary Miller and to be challenged by Ron Shepston and DCCC.
It appears that Shepston and DCCC will go heavily after the growing Asian population in Rowland Heights, and the Latino population in Chino. In fact, Rowland Heights is plurality Democratic, thanks to the heavy Chinese population. Only in the Orange County portion, particularly Mission Viejo, do the Republicans enjoy a crushing advantage.
I wish them the best of luck, and will find ways to help.
Daily Kos's description of CA-42
There is also a blog dedicated to the dirty deeds of Gary Miller.
Trash Dirty Gary