Outliers and American Vanguard ArtSince the last century, the relationship between vanguard and self taught artists has been defined by contradiction. The established art world has been quick to make clear distinctions between trained and untrained artists, yet at the same time it has been fascinated by outliers whom it draws selectively and intermittently into its orbits. For a new exhibition launching at the National Gallery of Art, curator Lynne Cooke explores shifting