No. 98-1252 Argued February 1, 1999 Decided February 26, 1999 On Petition for Review and Cross-Application for Enforcement of an Order of the National Labor Relations Board. Michael B. Nicholson argued the cause for petitioner. With him on the brief was Leonard R. Page. Charles Donnelly, Supervisory Attorney, National Labor Relations Board, argued the cause for respondent. With him on the brief were Linda Sher, Associate General Counsel, and John D. Burgoyne, Acting Deputy Associate General Counsel