SCN ran Mayor Antonio Villaraigosa's 2005 election and 2009 reelection as Mayor of Los Angeles, and during his first term, SCN partner Sean Clegg took a hiatus to serve as Deputy Mayor and senior advisor, where he was primary speechwriter and lead political advisor. In 2008, SCN ran the Mayor's signature "Measure R" initiative, which created a $40 billion revenue stream for mass transit and roads. The firm has served Villaraigosa as key strategic advisors throughout his tenure.

In addition to leading the nation's second largest city, Villaraigosa is President of the United States Conference of Mayors and Chairman of the Democratic National Convention. Politico's Mike Allen recently hailed Villaraigosa "a rising Democratic star."