Could a movie cure politicians of their slavery-metaphor addiction?

The film “12 Years a Slave” is one of great beauty about a great horror. Director Steve McQueen’s account of the American slave business – and it was an American economic institution that trafficked in flesh, blood and human suffering – is not particularly easy viewing, though you can’t look away. I saw it a few days ago, and once was plenty. But I would gladly see it again if politicians who can’t quit their slavery metaphors agreed to a movie date.