Already facing the loss of federal government funding, the community-organizing group Acorn also has run afoul of one of its big corporate partners, Bank of America Corp. In response to questions from The Wall Street Journal, a spokesman for the banking company said it has “suspended current commitments” to Acorn Housing, an affiliated group, and “will not enter into any further agreements with Acorn or any of its affiliates,” pending assessments by the bank of the organization’s operations.