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

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.

The company said Thursday night that it has made its “last, best and final offer” to the workers. It’s unclear if the workers are considering a strike.

A statement by King Soopers accused union negotiators of “stall tactics and creating uncertainty.” The company said its final offer included significant investments of up to a 6% increase in the first year of the contract and “promises to support, protect and invest” in employees’ interests.

On Thursday, the day before the labor contract extension expired, King Soopers presented a "final offer" to the union that featured "significant investments of up to a 6% increase in year one of the contract" and vowed to "support, protect and invest in the interests of their valued associates," the company said in a release.

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.