Republican Bill Simon's local campaign leaders say the Bay Area -- especially minority and gay voters -- could help swing November's gubernatorial election away from Democratic incumbent Gray Davis. "I think we can do 20 percent of the black vote for Bill Simon, and that's all you need to put a dent in the Democratic fabric," said Oakland management consultant Samuel Wallace, Simon's Bay Area campaign co-chair. "The battleground is the Bay Area." The prizes on that battleground, he and others say, are the votes of Latinos and Asians whose cultural conservatism could mesh with Simon's platform; African-Americans disappointed by...