United Auto Workers members went on a nationwide strike against General Motors on Sunday night after contract talks broke off Sunday.
It is the first strike against GM in 12 years. More than 49,000 UAW members walked off General Motors factory floors or set up picket lines early Monday.
Talks will resume Monday morning as UAW continues to demand a bigger share in the company's profits, including through annual pay raises.
Union officials say both sides are far apart in the talks, while GM says it has made significant offers.
UAW represents workers at 33 manufacturing sites and 22 parts warehouses across the country.
On Sunday, President Trump tweeted for the two sides to make a deal.
Trump is not the only politician who has weighed in on the topic. Democratic presidential candidates including Massachusetts Sen. Elizabeth Warren, former Vice President Joe Biden, South Bend, Ind., Mayor Pete Buttigieg, Vermont Sen. Bernie Sanders and former Housing and Urban Development Secretary Julian Castro expressed support for the workers.
"The CEO of GM made nearly $22 million dollars last year—281 times the median GM worker. I stand with the 46,000 UAW members who have moved to strike, fighting for affordable health care and fair wages. GM can afford to do right by the," Castro wrote on Twitter on Sunday.
A person briefed on the bargaining told the Associated Press that GM has offered the UAW new products for two assembly plants that it had planned to close.
GM says it presented what it believes was a "strong offer" including improved wages and benefits and investments in eight facilities in four states.
The strike will affect GM plants in Michigan, Ohio, Tennessee, Kentucky, New York, Texas and elsewhere in the U.S.
Cox Automotive calculated on Wednesday that GM has about a 77-day supply of cars, trucks and SUVs.
"If a strike occurs, GM has enough inventory on the ground so as not to hinder sales in the short run. Strong sales in August helped trim overall industry inventories to the lowest level in three years, according to Cox Automotive data, but GM's inventories remain healthy and even above industry average," according to commentary from Cox.
International Brotherhood of Teamsters General President Jim Hoffa said on Sunday that its members won't be transporting GM vehicles during the UAW strike.
The strike comes days after UAW official Vance Pearson was charged Thursday with corruption in an alleged scheme to embezzle union money and spend cash on premium booze, golf clubs, cigars and swanky stays in California. UAW President Gary Jones is identified as one of the co-conspirators in a criminal complaint accusing Pearson of misconduct, according to the Detroit Free Press, citing a source with knowledge of the case.