Obama won virtually every age group, though of course younger people were more likely to vote Obama than older people.
Hillary won the over-65 vote, but other than that, she did not win a single other age, race, or gender demographic (though she tied Edwards amongst whites over 60).
The Clintons have been accused of playing the race card in this contest. We do see some potential fallout for the Clintons in the African-American community: 74% of African-American voters think that Clinton unfairly attacked Obama. But when we look at the same question among white voters, a comparable number thought Clinton unfairly attacked Obama -- 68%.
Also worth mentioning, a majority of the voters -- 56% -- said that Bill Clinton's campaigning was important to their vote today.
If you haven't seen Obama's victory speech, here it is:
What's next? Florida, which, like Michigan, lost its delegates to the Democratic National Convention for holding its primary before February 5. After that is Super Tuesday, where nearly half of the states will be voting.