"We want to be responsive to people, to what constituents want, " Hamsher said.

CNN: Preston on politics: Blogging in the Obama era

Moulitsas and Hamsher appear as pragmatic as much as they are liberal.

CNN: Preston on Politics: Democrats target Democrats

In addition to prominent bloggers such as Moulitsas and Hamsher, the organization also includes influential liberal political groups such as MoveOn, Democracy for America and the powerful Service Employees International Union.

CNN: Preston on Politics: Democrats target Democrats