. Why does Jeff Smith not seem like the typical politician?

Jeff Smith is not corrupted by big-city politics and politicians, he is not a yes man but naive that makes him not like a typical politician.

Explanation:

In the movie, Mr. Smith goes to Washington apolitical comedy-drama which is based on the story of a young idealistic man Jefferson Smith who becomes senate under the mentor of Mr. Paine. Mr. pain is not a noble person as his reputation suggests and he tries to discredit the Smith.

Jeff Smith is not a yes man and naive in behavior and a young idealistic man which causes the problem to the corrupted politician that makes him different from other politicians.