An outside review of the beleaguered community group ACORN has found “serious management challenges,” but no pattern of illegal activity. The review, commissioned by ACORN in the wake of a hidden video expose that showed a few of its employees appearing to offer tips on how to break the law, also largely absolved the Association of Community Organizations for Reform Now’s current management, laying much of the blame on founder Wade Rathke for lax oversight and dangerously rapid growth. Scott Harshbarger, the former Massachusetts attorney who led the inquiry for the Proskauer Rose law firm, found that ACORN is not...