As observers like Charlie Cook have pointed out, Hillary has the coalition of support (women, strong Democrats, lower, middle-income and working families, Hispanics and African-Americans) that has traditionally won Democratic primaries...."
Hillary's support is highest among key voter groups who make up the core of the Democratic coalition: women, Hispanics, African-Americans, strong Democrats and lower, middle-income and working families. Her lead in the Democratic primary widens to 29 points among non-whites. The latest Gallup and CBS polls confirm the extraordinary enthusiasm for Hillary among women, Hispanics and African-Americans. And according to another recent Gallup poll, Hillary has a 22 point lead over her closest competitor among those who earn less than $50,000 per year.
Every major poll shows Hillary's lead increasing in the Democratic primary. In the Real Clear Politics average of recent polls, Hillary has a 14.3 percentage point lead, a widening of 5.5 percentage points in the last 3 weeks.
http://www.hillaryclinton.com/news/release/view/?id=234... And from the internal link there:
Clinton's widest leads over Obama are with women, seniors, those living in low- and middle-income households, and the non-college educated. Obama performs best with high socioeconomic groups and among those with more independent leanings, including young Democrats.
Only with "Democrats" who aren't really Democrats, but independents who lean toward the Democratic Party, as well as with college educated and upper-income Democrats, is Clinton's current hegemony challenged (though not usurped). Among these groups, Obama roughly ties with Clinton as the preferred candidate.
http://www.galluppoll.com/content/?ci=27676&pg=1