Chelsea Clinton

From prop to propagandist... Hillary's not so secret weapon has been outed. Our enduring memory of a geeky teenager with braces is slowly but surely being replaced with a polished, poised and some would say, convincing speaker.

As the only child of power couple extraordinaire, protected as much as was humanly possible, Chelsea followed in her father's footsteps and went to Oxford. She largely managed to stay out of trouble and the media with only a few hiccups... all of the usual variety associated with her age - partying, falling out of nightclubs. Not even a hint of inhaling.

Post degree, she joined McKinsey in New York and then a hedge fund and was rarely seen on the social circuit, preferring to attend charity dinners and sit on the board of a ballet company. She refused to give interviews. In short, she managed to work hard, play soft and keep a low profile.

Ring in the change. Initially we saw her by her mother's side, silent and supportive. However, as Hillary's campaign went from inevitable to deeply uncertain, she stepped up and is now eclipsing Bill's efforts. It seems that Obama has a new contender for the hearts and minds of the young. We are even starting to hear talk about the 'Chelsea effect'.

And whilst she is still refusing to give interviews and claims no political aspirations apart from getting her mom into the White House, I think that we will watch this space with interest.