Karl Rove, in a NH interview quoted by Raw Story, opines that the rise of the Blogoshpere has proven a much more useful and positive development for Republicans than it has for democrats.
I do also think that the Internet has proven to be a more powerful tool on our side than it has been for the other side. It has proven to be a tool on our side to sort of unite Conservatives and have a healthy intra-movement dialogue. But it’s essentially been something that has helped us gain in influence and broaden our appeal. Among Democrats, my sense is that the blog world has tended to strengthen the far Left of the Democratic Party at the expense of liberal, but somewhat less liberal, members of their party. It has tended to sort of drive their party even further to the Left rather than focusing on good ideas that would help unite people around common goals and common purposes. Instead, the Internet for the Left of the Democratic Party has served as a way to mobilize hate and anger — hate and anger, first and foremost, at this President and Conservatives, but then also at people within their own party whom they consider to be less than completely loyal to this very narrow, very out-of-the-mainstream, very far Left-wing ideology that they tend to represent.