How has senator paine managed to stay in office for 30 years?

It is not clear what your your question is about. But I guess that you mean the motion picture which name is Mr. Smith Goes to Washington. So I am completely sure that this question should be answered like this: Senator Paine has managed to stay in office for 30 years, because he compromises and takes the advice from Jim Taylor.

1st option, 2nd, and 4th