The Euston Manifesto was originally created for European Leftists, to help bring them back from the edge. Now, there is an American version.
What are the odds that the Kossites, Moveon.org, Firedoglake and James Wolcott will also be signatories?
I am betting 2 -1 odds against the core of the "New" Left (after 1968, every 20 years thereafter, a "new" left is created) will not sign. If they follow, there is hope yet for the two party system.
Otherwise, the Dems will die a 40 year death in the Minority because of their BDS.