Unionized workers at Costco, represented by the Teamsters, have overwhelmingly voted to authorize a nationwide strike as contract negotiations reach an impasse. With the current contract nearing expiration, workers are expressing frustration over stalled talks and are preparing for possible walkouts. Practice pickets have been organized in various locations, including Southern California and Long Island, as union members rally to demonstrate their resolve. The Teamsters emphasize that without a satisfactory agreement, the potential for a coordinated strike across the United States remains on the table.