Election Day is in full swing across California and the U.S. with voters casting ballots in key races, including the closely watched California gubernatorial race between Democrat Xavier Becerra and Republican Steve Hilton.Closer to home, Bay Area voters will cast ballots in local races, including mayoral elections across cities like Oakland, Alameda, Fairfield, Santa Clara and Petaluma. In San Francisco, voters will select supervisors for Districts 2, 4, 6, 8 and 10.