Major labor unions and dozens of liberal groups working to elect President Obama are worried he could "betray" them in the lame-duck session by agreeing to a deal to cut safety-net programs.
While Obama is relying on labor unions and other organizations on the left to turn out Democratic voters in battleground states, some of his allies have lingering concerns about whether he will stand by them if elected.
The liberal groups are planning to launch an aggressive campaign immediately after Election Day to pressure Obama and Senate Democrats not to endorse any deal that cuts Medicare and/or Social Security benefits.
They say Republicans are also being targeted, but acknowledge that Democrats are more likely to respond to the lobbying campaign.
The coalition has yet to be formally announced, so organizers are reluctant to speak publicly about the effort or disclose the full membership of the coalition.