In the 2012 election, California Democrats experienced tremendous success once again: not only did President Barack Obama win California's 55 electoral votes again with over 60% of the vote and Senator Dianne Feinstein reelected with over 62% of the vote, but California Democrats – despite running in federal and legislative districts that were redrawn by an independent redistricting commission for the first time, per the passage of Propositions 11 and 20, and the implementation of a new blanket primary – also won a net gain of four House seats by defeating three GOP incumbents and winning an open GOP seat and won a supermajority in both houses of the state legislature, a feat which the party last accomplished in 1882. Geographically, the 2012 elections also witnessed the California Democratic Party make inroads in traditionally Republican areas: San Diego, the second largest city in California and a longtime GOP stronghold, elected a Democratic mayor for the first time since 1988. California Democrats also notched up victories in other traditionally Republican areas such as the Inland Empire, Ventura County, the Central Valley, and Orange County.