We hang petty thieves, and appoint the bigger thieves to public office.
[Aesop, Greek slave & fable author]

 Those who are too smart to engage in politics are punished by being governed by those who are dumber.
[Plato, ancient Greek Philosopher]  Politicians are the same all over. They promise to build a bridge even where there is no river.
[N. S. Chruschtschow; Soviet-Russian politician]  When I was a boy I was told that anybody could become president. Today I believe it.
[Quoted in 'Clarence Darrow for the Defense' by Irving Stone]  Politicians are people who, when they see light at the end of the tunnel, go out and buy more tunnel.
[John Quinton; American actor/writer]  I offered my opponents a deal:
" . if they stop telling lies about me,
I will stop telling the truth about them .. ".
[Adlai Stevenson; campaign speech, 1952]  A politician is a fellow who will lay down your life for his country.
[Texas Guinan; 19th century American businessman]  I have come to the conclusion that politics is too serious a matter to be left to the politicians.
[Charles de Gaulle; French general & politician]  Let's end with a joke:
What happens if a politician drowns in a river?
That is pollution.
What happens if all of them drown?
That is solution!

[Thanks, JG.!]