“Democrats are going to have to give on entitlement reform,” Senator Mark Warner, a Virginia Democrat involved in budget negotiations, said in an Oct. 20 interview on CBS’s “Face the Nation.”

Two days later, the Progressive Change Campaign Committee, a Washington-based political group that raised and spent more than $1 million in the first six months of this year, blasted an e-mail to its 950,000 members, excerpting Warner’s comments.

“We need to pressure Senator Warner and other Democrats on their home turf to stop pushing for a Grand Bargain that cuts Social Security,” the e-mail said in bold-face type before asking for a $3 donation.

During the 16-day partial government shutdown last month, AARP monitored talks in Congress aimed at finding an agreement to open the government, while lawmakers in 18 states were warned in radio spots that “seniors are no bargaining chip.”

Warner “is aware” of the retirement group’s efforts and has received “several dozen” phone calls from constituents carrying the message, said Kevin Hall, the senator’s spokesman.

AARP’s Revenue

AARP, formerly the American Association of Retired Persons, is one of the largest nonprofits in the U.S. Based in Washington, the group reported revenue last year of $1.2 billion, according to its tax forms. It invested $174 million of that into legislative activities such as state- and federal- level lobbying and public policy advocacy.

AARP doesn’t make endorsements or directly fund races. Its advocacy spending does include campaign-style radio, television and mailed advertisements that highlight candidates’ positions on Social Security, Medicare and other seniors-focused issues. One of AARP’s top contractors last year was GMMB, a political advertising firm that worked on Obama’s re-election. AARP reported on its tax forms paying the firm $25 million.

Galvanizing Members

Similar spending has continued this year, amid several more rounds of congressional budget negotiations.