US retailer Safeway has mooted the sale of its 113 Dominick's stores in Chicago if it fails to resolve a dispute with unionised employees. Next Saturday sees a three-year contract between Safeway and the United Food and Commercial Workers union come to an end, and union officials are unhappy with the new deal Safeway is offering. The union is to poll the nearly 9000 members of staff who work for Dominick's, reported the Associated Press.