In a television commercial airing in major California media markets, state Controller Steve Westly evokes former President Carter to boost his conservationist credentials. NARRATOR: He's practical ... a problem solver with experience that sets him apart. Under President Carter, he worked on solar energy and conservation. Pro-choice. Defender of the environment. Committed to education. Steve Westly. Democrat. A different kind of governor. .... Analysis: ...... But while the ad shows a young Westly shaking Carter's hand, the former president hasn't endorsed his candidacy. Deanna Congileo, a spokeswoman for the Carter Center in Atlanta, said he makes no endorsements in primary...