Manifesto...Yeah!
It's a little bit miscast as a response to Tony Judt's broad-brush assertion that American liberals as a whole have failed to oppose George W. Bush, but this manifesto by Bruce Ackerman and Todd Gitlin and signed by many other worthies is good stuff nonetheless. It really strikes me as more of a response to the incredibly foolish "New American Liberalism" statement than to anything Judt wrote, as such.
I am, as a general matter, pro-manifesto:
The more, the merrier, says I.