By David Shepardson and Ben Klayman

(Reuters) -The United Auto Workers and Chrysler-parent Stellantis are set to resume bargaining talks Monday morning as a strike against the Detroit Three automakers enters its fourth day.

Union negotiators and representatives of General Motors, Ford and Stellantis held talks over the weekend in an attempt to end one of the most ambitious U.S. industrial labor actions in decades.

The coordinated strike, which has seen the union strike at all three automakers simultaneously for the first time, comes at a time when approval of labor unions among Americans is at its highest point in decades even as membership in unions has fallen for years and recently remains largely unchanged.

About 12,700 UAW workers are on strike as part of a labor action targeting three U.S. assembly plants – one at each of the Detroit Three – after the prior four-year labor agreements expired. Analysts and industry executives question how long it will be before the UAW strikes at additional plants in a move to raise pressure on the automakers.

UAW President Shawn Fain told NPR Monday there were “minimal conversations over the weekend so the ball is in their court …. We have a long way to go.”

He said the UAW is ready to do what was necessary when asked whether it would extend the strike to other plants this week.

The strikes have halted production at plants in Michigan, Ohio and Missouri that produce the Ford Bronco, Jeep Wrangler and Chevrolet Colorado, alongside other popular models.

A number of high-profile lawmakers have visited picket lines in support of the UAW, including House Democratic Leader Hakeem Jeffries on Sunday in Michigan.

Analysts expect plants that build more profitable pickup trucks like Ford’s F-150, GM’s Chevy Silverado and Stellantis’s Ram to be the next strike targets if the walkout continues.

Shares of BlueScope Steel slipped to an over three-month low as the strike weighs on its North American business. The Australian steelmaker generated nearly 42% of its fiscal 2023 sales revenue from North America.

The three automakers have proposed 20% raises over the four-and-a-half year term of their proposed deals, though that is only half of what the UAW is demanding through 2027. The UAW at one point during the talks offered to lower its demand to 36%.

Besides higher wages, the UAW is also demanding shorter work weeks, restoration of defined benefit pensions and stronger job security as automakers make the shift to electric vehicles.

(Reporting by David Shepardson and Ben Klayman, Editing by Deepa Babington and Alexander Smith)

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