Well look no further, there a place on the Internet called Ban T-Shirts, they got some awesome political t-shirts. I've been a fan of this website since two years now. They've got an impressive collection of political & environmental t-shirts. Here are two of the my favorite t-shirts from their website:
These guys are Organic & Sweat Shop Free.
This website is so recommended by TDjunkie for anyone who wants a political t-shirt / anti-religion t-shirts.