UAW Secretary-Treasurer Gary Casteel said the union is confident a majority of workers at Nissan's Canton, Miss., plant are in favor of unionizing.
Whether a majority of workers vote Thursday and Friday to do so is another question, he said.
The union is accusing Nissan of unfairly and illegally intimidating workers, pointing to anti-unionization videos playing on loop in break rooms and charging plant managers with pulling workers aside to discourage a vote in favor of the UAW.
Casteel, who is spearheading the UAW's efforts in Canton, accuses Nissan of spreading "outright lies" about the plant's future under a potentially unionized work force.
"I've not seen it worse," he said. "I've seen some crazy employers. But these guys' rap sheet now reads like Al Capone. They just break law after law. Most companies of this size, if you look at any of them, have certain things they just don't do because it's unethical."
Casteel said Nissan's tactics are sure to dissuade some workers from voting in favor of unionizing, but they also could backfire among other workers who are "fed up" with intimidation.
"It's a mixed bag," he said. "I'm sure they're deterring some people, but others are saying, 'I'm not going to take this or be pushed around on this issue.'"