Dems can't win an election alone--when we won in 06 & 08 it was with strong support from independents we didn't have it this time:
Independent voters, who in 2006 mostly voted for Democrats and helped end the Republicans’ 12-year majorities in the House and Senate, this time turned just as strongly against Democrats, according to surveys of voters who were leaving polling places. Two other groups who recently supported Democrats — suburban residents and college graduates — also gave Republican Congressional candidates more votes this year.
Democrats drew support from their traditional base — younger voters; blacks and Hispanics; those without high school diplomas and those with post-graduate education; less affluent voters; black women; union members; and Easterners.
Women have been among the Democrats’ most loyal supporters, giving them a majority of their votes in all but one of the past 14 election years. But the size of that traditional advantage appears to have narrowed this year. Since 1982, when exit polls first measured support, Republicans only once received the same share of women’s votes as Democrats — in 2002 — and Democrats lost their narrow Senate majority that year.
Voters who described themselves as moderates preferred Democrats by a significant margin, and liberals preferred them overwhelmingly. But the two groups were outnumbered by conservatives. Moderates were a smaller share of the electorate on Tuesday than they were in 2006.
While the survey results were good news for Republicans after two devastating election cycles, there were warning signs for the party’s long-term prospects.
The few demographic groups that preferred Democrats included some that are considered significant in the composition of the future electorate. One was voters under age 30. The others were Hispanics and Asian-Americans; both groups, which have objected to the Republicans’ tough stands against illegal immigration, are among the fastest-growing constituencies in the country.
http://www.nytimes.com/2010/11/03/us/03exit.html?src=mv