About 18,000 Costco workers will go on strike beginning Feb. 1 if their union doesn’t reach a deal with the warehouse retailer, the union announced Sunday. The Teamsters represent Costco workers in 56 warehouses across five states,

Union leaders scheduled strike-authorization votes for Jan. 29 and 30 against King Soopers stores in metro Denver.

Find out why more than 18,000 Costco workers have voted in favor of a strike warehouses across the country — and what it could mean for shoppers.

Together, with potential strikes by Safeway and Costco workers, grocery workers could launch one of the first major labor struggles under the new Trump administration.

King Soopers workers in the Denver area will vote on whether to authorize a strike after contract negotiations failed. Votes are scheduled for January 29 in Westminster and the following day in Greenwood Village.

Denver-area grocery workers are going to vote next week on whether or not to strike against King Soopers again, the local union representing the workers announced.