LEGISLATURE: The La Quinta lawmaker emerges as a candidate to succeed Dick Ackerman. SACRAMENTO - State Sen. Jim Battin, R-La Quinta, emerged as a leading candidate Wednesday to succeed Sen. Dick Ackerman, R-Irvine, as senate GOP leader if Ackerman runs for an Orange County congressional seat. Battin, who represents most of Riverside County, reportedly has lined up votes from a majority of the 15 Republicans in the upper house. Two other GOP senators also are interested in the post -- John Campbell of Irvine and Dave Cox of Fair Oaks. "Battin will win it, I'm told," said Assemblyman Ray Haynes,...