Geoconda Arguello-Kline, the union’s secretary-treasurer, noted in a statement Tuesday that the union had “seen many casinos and owners come and go” over the years, but “the Union and workers who helped build this town will always be here.”

“The workers at the Palms have made it clear that they want a fair process to choose whether to unionize,” Arguello-Kline said. “We will continue to work with the Palms employees until they achieve their goal.”