The union, which represents more than 18,000 workers at Costco, said 85% of its members voted to authorize a strike.

Teamsters members at Costco (NASDAQ:COST) have voted to authorize a strike by an 85% margin, the union announced, ahead of the deadline for negotiating a new labor contract by the end of the month. "The vote is a direct result of the company's continued failure to bargain constructively and refusal to present a fair contract offer that reflects

Costco workers affiliated with the Teamsters have voted in favor of going on strike if no deal is made ahead of a January 31 contract deadline.