There was an event in mid-February, rebroadcast yesterday on C-SPAN, which featured 5 authors of recent books on Presidents--3 of the historians were openly identified as Democrats and 2 claimed to be Republicans (including Kevin Phillips, author of a recent book defaming the whole Bush family). The Democrat who had written a book about Rutherford B. Hayes (Hans Trefousse) used his talk as an opportunity to make a number of cracks at Bush's expense, which went over well with the audience.
Meanwhile, the main professional organization for historians in the US, the American Historical Association, recently gave an award to Robert Byrd.