Conversation so far:
What was Danny Glover's political stance?
Danny Glover supports the Democratic Party.
Are there any other interesting aspects Danny Glover's politics besides supporting the Democratic Party?
Danny Glover's support of California Proposition 7 (2008) led him to use his voice in an automated phone call to generate support for the measure before the election.

Question: Why did he think he was racist?
Self-contained rewrite: Why did Danny Glover think that George W. Bush was racist?