主题：相信美国人得智商弱到什么地步 -- 陈笑东

but you need to compare carefully the electoral system of US and continental Europe.

Anglo nations use majority rule principle, while continental europeans used proportional election system. The former is proved to be more friendly to political establishment.

Please check the wikipedia for such info and the history of municipal elections in US. Many US cities used majority rule principle in 19th century and cities were often controlled by local political machines.

Tammny Hall is just one example.