Los Angeles mayoral candidate Wendy Greuel isn't using it, but candidates Eric Garcetti and Emanuel Pleitez are. So are five of 12 candidates vying for City Council District 13, and half the candidates running to replace Councilman Bill Rosendahl on March 5. Eric Swalwell, 32, used it to beat 20-term California congressman Pete Stark, and after the Scottish National Party used it, it saw its best election in 77 years.

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