From the Wikipedia entry on Rahm Emanuel, Obama's new chief of staff:
His brother Ari Emanuel is a talent agent in Los Angeles who inspired Jeremy Piven's character Ari Gold on the HBO series Entourage. Emanuel himself is the inspiration for the character Josh Lyman on The West Wing.
To my eye, this has the potential to be an entire new genre of fan fiction, given the popularity of both of these characters among fans of their respective programs. You can even see a family resemblance -- especially around the mouth and chin -- in these two photographs, though maybe that's my imagination. :-)
It's been a while since I've read a really good crossover story so I wanted to issue a challenge:
I am promising a signed copy of Convergence Culture to the first fan writer to produce a decent story (decent in quality, not necessarily in moral character) involving these two fictional characters. Extra credit if you can work Obama into the mix.