Well, I was for McCain for 2008. So, I wouldn't be thrilled.
But I would invite him into my house nicely and kindly. He's older than me, and has accomplished much more than what I can ever do at this age, so I would respect him. His family and himself deserve respect, because they are on a higher status level than us. I would discuss aspects such as the ones you mentioned to him, and explain why I do not support his views. I wouldn't tell him to get out of my house, of course not. =D