 Although the fight between Democrats and Republicans has been unequal for the last forty years, it has become increasingly lopsided, with conservative commentators frequently attacking the city's politics using the "ad hominem" phrase, "San Francisco values".In spite of its heavy liberal leanings, San Francisco has the highest percentage of "no party preference" voters of any California county, as of November, 2012.Campaign corruption is monitored by the San Francisco Ethics Commission and violations result in fines up to $5,000 per violation.