WARREN, OH—Workers will vote this week whether to unionize at Ultium Cells’ battery assembly plant here.

WASHINGTON—The National Labor Relations Board has ruled that employers cannot prevent workers from wearing union apparel or insignias on the job, absent special circumstances that justify such a restriction.

KOKOMO, IN—Workers at the Stellantis casting plant here ratified a new local contract on Sept. 12 after an almost three-day strike

DETROIT—A strike that could have halted production of some of General Motors’ most profitable and important vehicles has been narrowly averted.

RACINE, WI—Unionized workers of tractor manufacturer CNH Industrial are striking after contract negotiations between the company and the union, United Auto Workers, broke down.

MOLINE, IL—Union workers at Deere & Co. would get wage increases of 10 percent in the first year and 5 percent each in the third and fifth years under a tentative contract reached between the farm-equipment maker and the United Auto Workers union.

DUBLIN, VA—Workers at Volvo’s truck assembly plant here are walking a picket line again after a 37-day negotiating truce ended with a “no” vote on the company’s latest contract offer.

LOUISVILLE—Approximately 20,000 active and retired Ford factory workers, their immediate family members and surviving spouses will be able to get coronavirus tests at the UAW hall here after the union’s executive board voted unanimously to hire a private laboratory to perform the tests at no cost to members.

After sitting idle for weeks or even months due to the COVID-19 pandemic, U.S. assembly plants have finally restarted production, albeit with the occasional hiccup.