Over the last six months, at least 15 of the group’s 30 state chapters have disbanded and have no plans of re-forming, Acorn officials said. The California and New York chapters, two of the largest, have severed their ties to the national group and have independently reconstituted themselves with new names. Several other state groups are also re-forming outside the Acorn umbrella, and will not be affected if the national organization files for bankruptcy.