Cafe Press Terms I believe says they "approve" everything for sale.
If that's the case, someone has very poor judgement (or is a lefty themselves).
The "Kill Bush" products have been removed from CafePress.com. They were created by individuals across the globe, as are the more than 8 million products available on CafePress.com, a diverse network of more than one million shops.
Hate related materials are in violation of our terms of service and are prohibited from being sold through CafePress.com. CafePress.com is an automated service, and as such, products are reviewed on an ongoing basis to ensure that merchandise that is in violation of our terms of service is removed from our site.
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-- The CafePress.com Team