No. 20-1060 C/w 20-1061, 20-1134 02-19-2021 LEGGETT & PLATT, INC., Petitioner v. NATIONAL LABOR RELATIONS BOARD, Respondent International Association of Machinists and Aerospace Workers, Intervenor A. John Harper III argued the cause for petitioner Leggett & Platt, Inc. With him on the briefs were Arthur T. Carter and Arrissa K. Meyer. Aaron B. Solem argued the cause for petitioner Keith Purvis. With him on the brief was Glenn M. Taubman. Barbara A. Sheehy, Attorney, National Labor Relations Board