'As president, Barack Obama would be a genuine uniter.'

Serious question which requires a search of White House archives: Have we ever had a president who spent this much time encouraging Americans to blame their problems on specific groups of private citizens? 

Other have done it, but I don't think to the extent and frequency Obama does.  I recall Nixon referring to protesters as "bums" (or something close to it) but I don't recall him continually singling them out in most of his press conferences.  I don't recall Clinton continually attacking dot-com investors.