Throughout the primary season, Hillary Clinton and Barack Obama have been in a virtual tie, in both polls and votes cast. She trails him by less than 2 percent of all delegates. She appears to lead him in ballots cast, if you count the Michigan and Florida primaries, which were not sanctioned by the Democratic National Committee and therefore don't count in the delegate tallies but still represent actual voters' preferences and therefore do count in gauging the overall popular preference. Preliminary efforts to extrapolate from voting returns and exit polls suggest that overall she has probably won a majority of registered Democrats' votes, since Obama has drawn heavily from independents. And key Democratic blocs including Hispanics, Jews, women, gays, seniors, and the white working class have all preferred her to him.