02/22/2013 11:07 pm ET Updated Apr 24, 2013

NationBuilder, A Downtown L.A. Startup, Explodes Onto Scene In Los Angeles Mayoral, City Council 2013 Elections - Los Angeles - News - The Informer

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.