A federal labor board has asked Associated Wholesale Grocers to return to the bargaining table with the Teamsters Union. The regional National Labor Relations Board found in favor of the union’s complaints that Associated Grocers didn’t bargain in good faith and improperly outsourced jobs. That action sparked a bitter strike by the Teamsters, acting on behalf of 1,200 workers in Kansas City and Springfield. The regional board is seeking permission from Washington to pursue a federal court injunction to return union workers to their jobs.