Cosby is anti-GOP, anti-Tea Party, pro-Obama and possibly anti-white. He is not a Republican.
1980 article - He again at Playboy mansion (1968, 1980, 1981 articles I found with him at Playboy events). This article, he gets seemingly perturbed at question about it & his marriage (which he makes sound like an open marriage), and does not seem like fun guy on race issues: http://news.google.com/newspapers?id=R5McAAAAIBAJ&sjid=FGMEAAAAIBAJ&pg=6806%2C2705708