Overstreet v. United Brotherhood of Carpenters & Joiners, Local Union No. 1506

BERZON, Circuit Judge:

The National Labor Relations Board (“NLRB” or “the Board”) Regional Director, Cornele Overstreet, seeks to enjoin members of a building trades union from holding aloft .large banners announcing a “labor dispute.” The banners are located so that they are visible to customers of businesses that deal with certain contractors who do not have union contracts. While the banners are displayed, other union members distribute handbills that explain the “labor dispute.” The questions before us involve interpretation of the National Labor Relations Act (“the NLRA” or “the Act”), 29…