No. 17-1158 C/w 17-1165 06-19-2018 CELLCO PARTNERSHIP, d/b/a Verizon Wireless, Petitioner v. NATIONAL LABOR RELATIONS BOARD, Respondent Communications Workers of America, Intervenor Arthur G. Telegen argued the cause for petitioner. With him on the briefs were Robert A. Fisher and N. Skelly Harper. Barbara A. Sheehy, Attorney, National Labor Relations Board, argued the cause for respondent. On the brief were Peter B. Robb, General Counsel, Linda Dreeben, Deputy Associate General Counsel, Usha Dheenan