Ford announced on Monday that it is pausing construction on a multi-billion dollar battery plant in Marshall, Michigan that had drawn scrutiny from U.S. lawmakers over the company’s partnership with Chinese battery-maker Contemporary Amperex Technology Co. Ltd., or CATL.

“We’re pausing work, and we’re going to limit spending on construction at Marshall until we’re confident about our ability to competitively run the plant,” Ford spokesman T.R. Reid said in a statement. “There are a number of considerations, all of which we’re evaluating in terms of our competitiveness.”

“We haven’t made a final decision about the investment there,” Reid added, noting that the pause on the $3.5 billion plant was effective immediately.

The statement did not mention the ongoing strikes from the the United Auto Workers (UAW) union, who lashed out after hearing the news.

“This is a shameful, barely-veiled threat by Ford to cut jobs,” UAW President Shawn Fain said in a statement. “Closing 65 plants over the last 20 years wasn’t enough for the Big Three, now they want to threaten us with closing plants that aren’t even open yet. We are simply asking for a just transition to electric vehicles and Ford is instead doubling down on their race to the bottom.”

The Detroit News noted that when plans for the plant were announced earlier this year that Ford had hoped to be producing 2 million electric vehicles per year by 2026 but the company had to abandon those goals because the market demand is not what the company anticipated.

The announcement came as the struggling auto brand lost billions of dollars last year under the leadership of CEO Jim Farley in part because of bad investments and poor vehicle quality which has led to expensive recalls, according to a report from The New York Times.

Republicans from the House Committee on Energy and Commerce sent a letter to Farley on September 1 requesting information on the company’s relationship with CATL. The partnership, made in February, garnered criticism from some lawmakers who pointed to national security concerns.

“While Ford has labeled this project a ‘commitment to American manufacturing’ and asserts it will create 2,500 new American jobs, we are concerned that Ford’s partnership with a Chinese company could aid China’s efforts to expand its control over United States electric vehicle supply chains and jeopardize national security by furthering dependence on China,” the letter said.

Republicans referenced congressional testimony that said CATL could stop working on the project if tensions between the U.S. and China escalated, leaving the vehicle maker in a bind over how to source batteries for its vehicles. The lawmakers also questioned who would be employed at the plant currently under construction in Marshall, Michigan.

“Additionally, Members learned at this hearing that Chinese companies often supply their own workers to projects in Latin America and Africa, reinforcing fears that CATL will import workers for this facility rather than creating jobs for United States workers,” the letter said.

The GOP lawmakers requested a copy of the licensing agreement between Ford and CATL, along with communications from Ford discussing federal incentives for the project.

“We seek to learn more about whether this partnership, and others like it, will potentially exacerbate our reliance on China. Should China gain control of domestic electric vehicle production, the United States would be exposed to serious national security risks at a time of escalating geopolitical tensions,” the Republicans said.

A small group of House Republicans has said that they’re willing to risk a possible government shutdown, rejecting party leadership’s funding bills unless specific demands are met. But they may face an uphill battle in the court of public opinion, according to an analysis of polling data showing House Speaker Kevin McCarthy remains immensely popular with conservatives.

The members holding up spending bills have framed their effort as an attempt to hold the line for conservatives — but polls indicate conservatives in the country are sticking with McCarthy. The most recent favorability survey for McCarthy, conducted as he sparred last week with members such as Rep. Matt Gaetz (R-FL), found that he is viewed favorably by conservatives by more than a 2 to 1 margin, 56% to 26%, according to The Economist and YouGov. Among respondents who said they voted for former President Donald Trump in 2020, it’s even more favorable for McCarthy, with 59% in favor and just 23% opposed.

McCarthy’s fight for the speakership, which was made more complicated by virtually the same group of Republican holdouts in the caucus, was boosted significantly by an endorsement for the job by Trump, though the former president is now urging Republicans to “hold the line” ahead of a potential shutdown, stating his belief that President Joe Biden will be blamed. But the target of Trump’s ire in his Sunday night post on the potential shut down was not McCarthy, but rather Senate Minority Leader Mitch McConnell.

McCarthy remains in good standing with the former president, though unable to wield that influence to wrangle the more unruly members of his caucus. Gaetz and his fellow holdouts have killed McCarthy’s effort to buy time for negotiations with a stopgap spending measure.

While the House hardliners have failed to tank McCarthy’s credibility with the base, the shutdown push may not prove detrimental for the hardliners either. Most Republicans say that a government shutdown would not have a direct impact on them. According to the Partnership for Public Service, 46% of Republicans say that a government shutdown would personally affect them. A majority of Americans, 68%, say the threat of a shutdown hurts their faith in government, however.

Gaetz appeared on Fox News over the weekend to defend his stonewall of McCarthy in a combative interview with “Sunday Morning Futures” host Maria Bartiromo. Gaetz accused McCarthy of delivering nothing more than performative “wins” for conservatives and said the Republican leader needed to be held accountable to win concrete victories.

“We can set up committees and have hearings and yell at people, but at the end of the day if we still send the check to fund a weaponized government, having a weaponization subcommittee is little relief to the American people,” Gaetz said.