From Chapter 28 in Douglas Adams' The Restaurant at the End of the Universe
The major problem - one of the major problems, for there are several - one of the many major problems with governing people is that of whom you get to do it; or rather of who manages to get people to let them do it to them.
To summarize: it is a well-known fact that those people who must want to rule people are, ipso facto, those least suited to do it. To summarize the summary: anyone who is capable of getting themselves made president should on no account be allowed to do the job. To summarize the summary of the summary: people are a problem.
I can't say it better myself, which is why I don't care how exciting a speaker is, or how much any candidate offers change (see both democrat and republican conventions for details) if you want to be president, I just don't trust you. People are definitely a problem.