The subject of this documentary is New Orleans, and this program might as well be an unofficial episode of HBO’s Treme. It’s about local politics, racial tensions and corruption in that city, three of David Simon’s favorite topics, in Treme as well as in his previous TV series, the classic The Wire. In this case, in real life, tonight’s POV is about the re-election campaign of Stacy Head, who’s already served in her city council seat, but is finding opposition to her bid for another term. One reason? She’s white, in an area traditionally represented by African-Americans. Check local listings.