Republican John McCann and Democrat Paloma Aguirre are vying for the District 1 seat on the San Diego County Board of Supervisors.

The Republican Party's hopes of winning the state of California may have taken a hit as the proportion of Republicans registering in the state has declined. According to voter registration data, the number of Republicans in the state is falling. Newsweek contacted the California GOP by email for comment.

California Democrats have made a series of moves to blunt or roll back environmental laws. What's behind the shift?