Video: California Senate battlegrounds begin to emerge

These are the final days of the 2015 legislative session at the state Capitol, but 2016 legislative contests already are taking shape.

Here’s a video look at four competitive state Senate in November 2016. The results could reduce Democrats’ current 26-14 majority in the upper house.

Note: November 2014 precinct voter registration data comes from the Statewide Database. A precinct’s color represents its dominant party affiliation: blue is Democratic, red is Republican, and green is no-party preference. The height represents the margin between a precinct’s dominant party affiliation and the next-largest affiliation.

This story was originally published August 25, 2015 at 11:20 AM.