Behind an Antiwar Ad, a Powerful Liberal Group - New York Times
Despite conservatives’ efforts to lump together the grass-roots organization and the party and to force individual Democrats to take responsibility for MoveOn’s wordplay on General Petraeus, the top American commander in Iraq, as “General Betray Us” in its advertisement in The New York Times, the relationship between the two is often complicated and, at times, shows visible fractures.
“I think Democrats understand that when we can join forces and work together, it’s very powerful,” said Eli Pariser, executive director of MoveOn Political Action. “And then when we can’t, it’s not fun.”
This month, MoveOn sent an e-mail message to members asking whether it should start organizing potential primary challenges against Democrats who were not tough enough on the war, a move that upset Democratic leaders. The group plans to announce the results of its survey on Monday.
Essentially, MoveOn.org is in full agreement with the Democratic party, except when the party is not far leftwing enough for the organization.

