Nationwide, more than 18,000 Teamsters at Costco are demanding a new contract and are prepared to strike if Costco doesn't meet requests, the union said in a release.

The union representing 18,000 Costco workers says executives at the warehouse retailer “abruptly ended” collective bargaining negotiations last week.  “

Teamsters General President Sean M. O'Brien, General Secretary-Treasurer Fred Zuckerman, Teamsters Warehouse Division Director Tom Erickson, and hundreds of Costco Teamsters rallied and engaged in a practice picket in Long Island,

The Costco Teamsters represent more than 18,000 workers nationwide.