Trump's trade policies protect the generic aluminium product made by Magnitude 7 Metals LLC, a 50-year-old smelter on the banks of the Mississippi in southeastern Missouri. But the tariffs often do not cover the value-added aluminium products being shipped to the Unites States by foreign competitors, undercutting the company's position.

"The rest of the world has gamed the tariffs, in our opinion," Magnitude 7 Metals chief executive Charles Reali told Reuters in an interview. "The Commerce Department tried to help, but missed the mark."

The grim outlook for Magnitude 7 has been exacerbated by the coronavirus, which is reverberating around the globe while raising fears of a global recession. On Friday, the London Metal Exchange (LME) aluminium price fell to $1,676 per ton, the lowest since October 2016.

"We are in prayer" mode, Reali said. "If things don't turn around in the next 60 days, I don't know."

Magnitude 7 Metals opened to great fanfare about two years ago in a ceremony attended by then-Missouri Governor Eric Greitens. Trump's 10% tariffs on imported aluminium helped restore more than 400 jobs in New Madrid County, where nearly a quarter of the population lives in poverty. The plant shut down in 2016 when the previous owner, Noranda Aluminium, filed for bankruptcy.

But Reali describes the market for the plant's generic aluminium product, P1020, as "absolutely terrible."

"These prices are 1988 and 1989 prices, dollar for dollar. Obviously, the costs are a hell of a lot more today than they were then," Reali said.

Magnitude 7's aluminium fetches about $1,680 a ton on the metals market, down from about $2,100 a ton a year ago, Reali said. The original business plan, when former Glencore Plc trader Matt Lucke bought the plant for about $14 million out of bankruptcy, factored in a price of $2,300 to $2,400 per ton.

"We can't sustain what we are doing at the current price," Reali said. "Our costs are much higher. We're seeing red numbers every month."

The plant employs 515 workers. In a settlement last year with the National Labor Relations Board, Magnitude 7 agreed to recognise union workers. But there's no collective bargaining agreement, and federal law prohibits the company from laying off hourly workers during contract negotiations, limiting the plant's flexibility, Reali said.

The last time the aluminium plant closed, it was a body blow to the economy and to the county's morale. Local police and ambulance budgets were cut. The county went into the red and the school district saw a 10% drop in enrolments as families left, local officials told Reuters.

"We're here today," Reali said. "Can't speak for next week. It's a day-to-day thing."

(Reporting By Tim McLaughlin. Editing by Gerry Doyle)

By Tim McLaughlin

Stocks treated in this article : LME Aluminium Cash, Glencore