GM is axing several of its traditional sedan lines to concentrate on electric and autonomous vehicles like the Chevrolet Bolt.
The US economy remains strong overall, with the unemployment rate at a near 50-year low of 3.7 per cent.
The Detroit-based firm said it is shutting assembly plants in Ohio, Michigan and Ontario in Canada.
The president has often used General Motors as an example of how he was bringing jobs back to America.
GM sees an economic downturn or at least a vehicle downturn and did so back in April when it stopped reporting monthly auto sales.
"We estimate sedans operate at a significant loss, hence the need for classic restructuring", he wrote.
In October, GM offered buyouts to 18,000 white-collar workers as part of a cost-cutting initiative.
But the fact is, when it comes to factories with unallocated products, Dias has far less leverage with GM than do his counterparts in the U.S.
It plans to reduce annual capital spending to $7bn by 2020 from an average of $8.5bn a year during the 2017-2019 period.
The two Democrats also pointed out that taxpayers bailed out the automaker a decade ago and have expressed frustration during past months over their attempts to talk with GM CEO Mary Barra about how to keep the plant running.
Brown also said it is clear that GM doesn't respect the workers at Lordstown and is demanding answers from the company.
Toyota also has discussed cutting costs, even though it is building a new assembly plant in Alabama. GM will discontinue the Cruze in the USA market by 2019.
Two of the plants made engines and parts for those cars.
Oklahoma vs. Texas Big 12 Championship
The OU win advances the Sooners to the Big 12 Championship Game to face Texas next Saturday at AT&T Stadium in Arlington, Texas. In the second quarter, Grier was sacked by Caleb Kelly , who stripped the ball, scooped it up and scored for a 35-21 lead.
Ms. Barra said the automaker doesn't foresee an economic downturn and is making the cuts "to get in front of it while the company is strong and while the economy is strong".
The plant in Lordstown, Ohio, which makes the Chevrolet Cruze compact vehicle also is on the list, and Barra said the Cruze would no longer be sold in the U.S. Production would stop March 1.
Call it a case of workers lose, investors win.
If GM does follow through by closing the plant, there may be only one thing left to do: State-run auto company. "It's hard. It's frightful". Production began on November 7, 1953, and in the 1980s the plant employed roughly 23,000 people. Some workers at the Oshawa plant walked off the job Monday.
"I can't believe our president would allow this to happen", she said Monday.
"I implore President Trump to keep his word when he came to the Mahoning Valley previous year and promised jobs were 'all coming back, '" he said in the press release.
"I was very tough", Trump said.
A sign stands outside Oshawa's General Motors auto assembly plant in Oshawa, Ont. GM Canada said it will slow production and temporarily lay off employees at the factory as switches over to truck from vehicle production to address shifting US buyer preferences. I said, well, get a vehicle that is selling well and put it back in.
The Oshawa Assembly Plant employs 2,522 workers with Unifor Local 222, according to GM's website.
But that argument all but evaporated Monday when the company announced that as part of its plan to save US$6 billion by the year 2020, it was also shutting down production at four other USA plants - several of them deep in Rust Belt states that helped elevate Trump to the presidency in 2016.
The plant closure announcement was confirmed late Sunday by an official familiar with the decision. But sales of the Chevrolet Cruze are off 22 percent.
At the time of the transfer, Dias said Carlisle's appointment to lead Cadillac would raise his profile and influence within GM's headquarters in Detroit, and that "would be a huge benefit for us".
"Everything is up in the air", she said.