I really can't give you an interview, except the ACTUAL
INTERVIEW on Dateline which hints a little something on, not just Washington, but generally conservative popular actors in Hollywood - they don't want to divulge their views knowingly that they may not get really good roles.
Plus there was a CNN interview with an actress in Hollywood who is conservative and discussed how conservatives in Hollywood don't really talk about their politics that much because it can hurt their chances getting better roles. Discrimination if you will. I'd say that it's a good cue to take notice.
Lastly, and this is a bit tricky...he does belong to COGIC - Church of God in Christ and it's generally conservative by nature.
P.S. You could check and see whether there are voting records in his hometown relating to numerous elections and his political affiliation could be divulged from there.