I don't recommend many sites. But definitely put this one down on your list of ones to visit: It's Ruy Teixeira's new blog, Donkey Rising. (We'll leave explaining how to pronounce his name for a future post -- a long future post.)

Teixeira is one of the sharpest progressive thinkers around when it comes to the interplay of demographics, politics, and public opinion. He's also coauthor, with John Judis, of the The Emerging Democratic Majority -- see the TPM review of it here.

His big issue is getting the liberal/populist and centrist wings of the Democratic party to be wings of a single movement rather than, fundamentally, antagonists -- without which both are sunk. Definitely stop by his new site to see his blog and his weekly newsletters on public opinion and political strategy.