California voters approved constitutional amendments in 2008 and 2010 that removed the power to draw state legislative and congressional district boundaries from politicians and placed that authority with an independent redistricting commission.
October 06, 2025
high
institutional
Describes the structural change to how district maps are drawn in California.
In 2020, California voters removed the state legislature's authority to draw legislative and congressional district maps and established an independent redistricting commission.
January 01, 2020
high
temporal
State-level change to redistricting authority implemented via ballot measure in California.