The race for the Democratic nomination isn't settled yet, but a coalition of outside liberal groups is already gearing up for the general election race. The coalition, made up of groups like MoveOn, the AFL-CIO, the Change to Win labor federation and others will be announcing a $350 million effort for voter mobilization and advocacy this Fall.

Past election cycles have of course seen independent political activities on behalf of a particular side, but this one is being billed as the largest ever single coordinated effort. One potential pitfall: If Barack Obama is the Democratic nominee, he might be put on the spot about this group's activities versus his own policies against outside groups spending on his behalf.