BALTIMORE — The community organizing group Acorn, battered politically from the right and suffering from mismanagement along with a severe loss of government and other funds, is on the verge of filing for bankruptcy, officials of the group said Friday.

Bertha Lewis, Acorn's chief executive, blamed "relentless, well-funded right-wing attacks"� reminiscent of the McCarthy era.

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Acorn is holding a teleconference this weekend to discuss plans for a bankruptcy filing, two officials of the group said. They asked not to be identified because they were not authorized to...