With two major contests in the Democratic nomination race finally approaching, Jonathan Singer takes a look at the latest polling. Singer writes that surveys in Pennsylvania have mixed results. Most show the race close with Hillary ClintonHillary Diane Rodham ClintonDershowitz: 'Too many politicians are being subject to criminal prosecution' The 13 Republicans needed to pass gun-control legislation Democrats spar over electoral appeal of 'Medicare for All' MORE slightly ahead and another poll by reputable pollster SurveyUSA showing the former First Lady up big. The picture is less murky in North Carolina, where Barack ObamaBarack Hussein ObamaLet's not play Charlie Brown to Iran's Lucy Mattis dodges toughest question At debate, Warren and Buttigieg tap idealism of Obama, FDR MORE has held double-digit leads in recent polls, Singer writes.