The Teamsters said the strike at seven facilities is the largest ever against Amazon. But the retailer doesn't anticipated a slowdown to deliveries.

Amazon.com workers at seven U.S. facilities walked off the job early on Thursday during the holiday shopping rush, aiming to pressure the retailer into contract talks with their union.Warehouse workers in cities including New York,

Thousands of Amazon workers in the United States walked off the job early on Thursday to pressure the company into union contract negotiations, according to the International Brotherhood of Teamsters union.