Where can I download the "Gotham" font/typeface?

I'm looking for the font/typeface used in the Obama campaign, so I can use it to make shirts / bumper stickers / etc., on CafePress. I know it's called "Gotham", but I can't find it available for download anywhere. I already tried CoolFonts.com. as per another user's suggestion - no luck.... show more I'm looking for the font/typeface used in the Obama campaign, so I can use it to make shirts / bumper stickers / etc., on CafePress. I know it's called "Gotham", but I can't find it available for download anywhere. I already tried CoolFonts.com. as per another user's suggestion - no luck. Any help is appreciated. :)