@Stanley of course politicians have their own best interests at heart, every human, yes every life form on this planet has. But this does not change the fact that being a politcian is a job, and the people are the boss. And as such, a politician has to put the interests of his employer first, which he of course must find out first and then advertise himself based on this information, so that the employer, the voters, employ him, and once he has that position, he has to continue working for his employer’s best interest. If he doesn’t, and it upsets the employer enough, he will be gone after 4 years. I am sure there are ways to get rid of him even earlier, if the voters so desire.
The problem is that many politicians do not really seem aware of that fact and act as if they are the boss once in office. I think that is in part due to the fact that the voters do not make this clear enough. Remember that Bush has been elected TWICE for president.