>> Via Mid-Atlantic Art News, nearly every one on the Washington Post arts staff has been slammed over last Thursday’s article on art in the White House Green Room. The Seattle Post-Intellgencer blog calls Post writer Jacqueline Trescott’s race labeling of Jacob Lawrence as “the greatest African-American artist of the 20th century” a “disgrace,” the staff photographer inept, and most hilariously, Blake Gopnik, who gets skewered though he wasn’t even involved with the article,…