(Apperantly) yes you can.

And did.

The illustrator Patrick Moberg sums it up eloquently:

The obama campaign inspired millions of people to vote and they also inspired milions of artists to share their vision of Hope (or in this case Obama). The list is endless, here are just a few examples/links.

There is of course the famous poster by Shepard Fairey.

Or the website Design for Obama, with many amazing posters to date.

And of course not to forget Will.I.Am´s song Yes we can.

And the campaign itself was pobably the best designed ever. Here is a neat post by london graphic designer Ben Terrett with a collection of some nice articles which analyze this phenomenom. Among it a great photo gallery by the Guardian, 30 graphic designers giving 30 reasons for voting Obama and this great article< at Speak up.
They branded his posters, pins, stickers, plane, bus…and even christmas ornaments…the variations are endless.
Ah, and the typography! Gotham. *Sigh*
Here is a good article by the Boston Globe about this particular phenomenon of the phenomenon.