WASHINGTON (CNN) -- A push to persuade 70 "ultra-safe" House Democrats to hand over a portion of their campaign war chest to competitive House races is gaining steam online. After identifying over $50 million in the campaign accounts of Democrats who do not face any significant challenge in next month's elections, liberal blogger Chris Bowers at Mydd.com teamed up with MoveOn.org to urge people to call the lawmakers and ask them to "pony up."

Since the pressure campaign started Monday, Rep. Barney Frank, D-Massachusetts, announced on his Web site he was donating an additional $250,000 to Democratic candidates and the Democratic Party -- a decision his spokesman said was "spurred in part" by the online campaign. Now three more Democrats on Bowers' list, Rep. Adam Schiff, Rep. Hilda Solis, and Rep. Grace Napolitano, all from California, have announced new donations. Spokespeople for each campaign acknowledged receiving calls, though each said the donations were not directly related.

Other Democrats have signaled their campaign money is staying put. A spokeswoman for Rep. Marty Meehan, D-Massachusetts, whose over $4 million in campaign cash has made him a prime target, said they have no plans to move funds. She noted the Congressman will continue raising money directly for the DCCC.