A progressive group on Wednesday called on centrist group Third Way to stop criticizing Sen. Elizabeth Warren (D-MA) and her plan to expand Social Security and also demanded it reveal its donors.
The Progressive Change Campaign Committee, along with members of Social Security Works and Campaign for Community Change, submitted a petition with more than 125,000 signatures that read:
Third Way should publicly reveal its Wall Street donors so everyone knows why they are attacking Elizabeth Warren. Third Way should also stop attacking popular progressive ideas like expanding Social Security.
The petition is the latest hit in the ongoing fight between Third Way, Warren and the PCCC, which started earlier this month when Third Way leaders penned an op-ed in the Wall Street Journal criticizing Warren and her plan to expand Social Security.
PCCC urged House members to cut ties with Third Way. Third Way co-founder Jim Kessler later defended the op-ed and explained that it was not meant as a personal attack on Warren.
Warren told the Huffington Post that Third Way was "flatly wrong" in its belief that Social Security is insolvent. The senator has also called on banks to disclose major donations to think tanks.
Correction: This post originally incorrectly stated that Warren called on Third Way to reveal its donors. Warren wrote a letter to six CEOs of U.S. banks asking them to disclose donations to think tanks.