Then you're blind. Do you know who Patty Murray is? John Kerry? Tom Daschle? Harry Reid?
Of course he gives to both parties. He's playing politics.
Individuals, not parties, ALL Republican. However, on the other side, we have things like this:
http://www.geocities.com/commulinux/hall_fame.html
Communists hate Gates, being the richest man in the world. But they put IBM at the top of their hall of fame.