Democrat Jerry Brown, at 71 years old, is offering himself to California voters as the pragmatic, moderate and mature gubernatorial candidate with the experience to bring the state back from the brink of disaster. But with four decades in public service and a reputation as a political chameleon, the attorney general must try to shake the one word that critics have aimed at him for the past 35 years: "Moonbeam." Moments after Brown, who was governor from 1975 to 1983, delivered a three-minute video Tuesday announcing his candidacy, his GOP opponents began reviving memories of the nickname as shorthand for...