Edited sentence: This, and his willingness to sometimes base arguments on discredited Republican assertions such as a claim he made in a March 6, 2005 roundtable in the New York Times Book Review that the late Pennsyvlania governor Bob Casey was denied a speaking opportunity at the 1992 Democratic convention simply because of his opposition to abortion (when in fact the denial was due to Casey's refusal to endorse Bill Clinton's presidential candidacy; other abortion opponents who had endorsed Clinton were allowed to speak), have led to him being called a Fox News liberal