[inglor_cz]

One thing that puzzles me a bit about the U.S. is nonexistence of viable local parties. Something similar to the Scottish National Party in the UK or Freie Wähler in Bavaria.

How come that the entire political scene on all levels collapses into just two poles, with the predictable result that many places are de facto one party places?

Why doesn't America have local Ross Perots in various corners of the country, starting their own political parties specific for one place only?

[ferdowsi]

We do. The Socialist Alternative are a viable party in places like Seattle, local politicians often run as independents aligned with organizations like DSA, etc.