Someone was also hailing JFK as the last "people's President" (whatever that means) a few weeks back here, and I thought of posting that article but couldn't be arsed.
Its a great read, and anyone who still thinks the White House is a place for doe-eyed idealists needs to read some more detailed history about events, and not any in particular. But just to understand that the person who sits in that office faces pressure and/or straight enmity from politicians in the other party, in their own party, members of the media, business people, leaders of nations that are clearly your adversaries and sometimes those of nations that are supposed to be your friend. So they need to be players in that game long before they get there, and they need to play to win, meaning getting your bills passed, keeping public opinion on your side, giving your enemies pause, etc. (And when its all done, get that book deal and the speaker fees, because no one should have to live on $200k a year after the presidency)