2010Final results
2010 election for California Senate District 30
California State Senate · California
Ronald S. Calderon (D) won with 68.6% of the vote, defeating Warren P. Willis (R) by 37.2 points.
Ronald S. CalderonDemocrat · winner · incumbent
68.6%105,946
Warren P. WillisRepublican
31.4%48,534
154,480 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET