The AFL-CIO released a post-election survey  highlighting how union members made the difference in progressive victories around the country. Check out their powerpoint presentation  on how union members split 74% to 26% in favor of Democrats and the strategies that turned out these voters for the midterm elections.
People for the American Way , building on a broad survey in August, highlighted the closing of the "God gap" between the parties in 2006 as religious voters expanded thier definition of "values" to include the integrity of candidates, promoting individual freedoms and eliminating poverty and expanding access to health care.
Highlighting rising inequality in the economy, EPI documents  that the top fifth of households earned just over half of the nation's income in 2005, equal to the highest share on record, while low- and middle-income households saw real incomes decline.
The Brookings Institution released a new report on exurbia , finding that six percent of the population lies in these sprawling areas, with a disproportionate number in the South and the Midwest. The study finds that most have moved to such exurbs because the lack of affordable housing in urban centers drives them to long commutes in the exurbs.