In case anyone missed it -- presumably because of trying to smother her/himself with a pillow during the RNC -- Clint spoke at the convention last night, addressing Imaginary Obama in an empty chair (and rambling on for so long they couldn't show the Movie of Mitt in prime time). It's become quite an internet meme, and it's pretty damn funny. Chris Rock tweeted "Eastwood on phone to Obama after speech: it went as planned, sir."
But I think the above sees it most clearly, as metaphor for what's motivating teabaggers.
(For the record, I admire Eastwood a lot for his movie-making, producing ones that are thought-provoking and, even, daring.)