"What kind of democracy is that?" Mr. Schwarzenegger asked in his State of the State address. He noted that the current system allows special interests to dominate low-turnout party primaries, which thus favor rigidly ideological candidates in both parties. He vowed to repair this "rigged" system even though many incumbents in his own party don't want to put their own seats at risk. ... In tackling redistricting, Mr. Schwarzenegger faces a daunting political challenge. Five times in the past, voters have rejected redistricting reform, including similar commissions. Former Assembly Speaker Willie Brown boasted in the 1980s about his ability to...