Democrats are maintaining their grip on the top of the ticket races in California in the final days of the election campaign. U.S. Sen. John Kerry has a seven-point lead over President Bush, and U.S. Sen. Barbara Boxer is dominating Republican challenger Bill Jones, according to the last statewide Field Poll on the contests before Tuesday. In the presidential race, Kerry leads Bush by 49 percent to 42 percent among likely voters, and has maintained a consistent distance in the competition for California's 55 electoral votes. But support for Bush in the inland valleys has prevented the blowout some expected...