Politicians earn their discredited reputation because of all professions, theirs is the one in which self-dealing is most often rationalized as serving the greater good. Many politicians fool us when they can get away with it, claiming they're doing what's right for us when they're really doing what's right for them.
Lincoln suggested that there were limits on what they can get away with when he said, "you can fool all of the people some of the time, you can even fool some of the people all of the time, but you cannot fool all of the people all of the time."
It's time to ask some follow-up questions about Lincoln's comforting assertion.
First, was it a statement of hope or fact?
Second, if it was fact during Lincoln's time, is it still now? Fooling people has come a long way since then, and while we have grown more skeptical there's reason to believe we just can't keep up.