Linden Lumber Division, Summer & Company (Linden) (defendant) refused to recognize a union that claimed it had authorization cards from a majority of Linden’s workers. The National Labor Relations Board (plaintiff) found that unless unfair labor practices impaired the election process, Linden could lawfully refuse to accept evidence of majority status other than board election results, like authorization cards or worker participation in a union-organized strike. The board also concluded that the union, not the employer, had to request an election. The appellate court disagreed, reasoning that Linden had to request an election. The Supreme Court consolidated Linden’s appeal with another that raised identical issues and granted review.