The year in art is ending on a note both sour and defiant. On Nov. 30, Smithsonian Secretary G. Wayne Clough, caving to criticism voiced by conservative politicians and religious groups, ordered the removal of David Wojnarowicz’s 1987 video A Fire in My Belly from the National Portrait Gallery’s exhibition “Hide/Seek: Difference and Desire in American Portraiture.” It was a cowardly decision; one that ultimately has undermined the credibility of Clough and his institution.