It's Tuesday night and Walter Moore, candidate for Los Angeles mayor, is on the air and taking calls. Ripping the record of the current officeholder, Antonio Villaraigosa, consumes a major chunk of his hour with KABC's John Phillips. "Ask yourself, how would the city be different if it were expressly run by developers, gangs and the nation of Mexico? You'd be hard pressed to come up with any policy changes," Moore tells listeners. The often caustic world of L.A. talk radio, which has never been friendly environs for the mayor, has become a comfort zone for Moore's long-shot campaign to...