Carly Fiorina, Meg Whitman and even Sen. Scott Brown — the Republican who shocked the political world in January by winning the Massachusetts Senate seat long held by Ted Kennedy — have walked into a Magnolia Boulevard headquarters for the Republican Party of California this year. "That just doesn't happen," said Jane Barnett, chairwoman of the Los Angeles County Republican Committee. "Not in L.A." Barnett said Meg Whitman has visited the Southland more than 60 times. The party has opened more offices this year in Los Angeles County — 18 —- than at any time in recent memory. The number...