public opinion polling from early january 2007 through mid-february 2008 consistently gave hillary clinton a double digit lead over barack obama. by the beginning of april, polls of pennsylvanians showed obama trailing clinton by an average of 5 points. according to 2 polls taken one day before the primary, hillary clinton was leading barack obama by 49%-42% and 51%-41%. other polls showed clinton leading by an average of about 6%.