The Wire star Wendell Pierce has announced that he is starting a public campaign to become the voice of Family Guy character Cleveland Brown.Mike Henry, a white actor who has voiced the role of the black character since the cartoon’s beginning, announced last week that he would be stepping back from the part, saying “persons of colour should play characters of colour”.Following on from the news, Pierce tweeted: “Now that Mike Henry has consciously given up the role of Cleveland, I am publicly