No. 98-1386 Argued May 10, 1999 Decided June 18, 1999 On Petition for Review and Cross-Application for Enforcement of an Order of the National Labor Relations Board. Joseph L. Manson, III argued the cause for the petitioner. Ronald B. Natalie and Douglas W. Hall were on brief. David A. Seid, Attorney, National Labor Relations Board, argued the cause for the respondent. Linda Sher, Associate General Counsel, Aileen A. Armstrong, Deputy Associate General Counsel at the time the brief was filed, and