Image caption Rick Huether's family has run Independent Can Co since 1948

Rick Huether's family has run a manufacturing company in Maryland since the 1940s. So he knows a bit about keeping blue-collar jobs in America.

But now he, like many other manufacturers in the US, is worried.

In March, President Donald Trump announced steep tariffs on foreign steel and aluminium, citing the need to protect those industries.

But the move has left hundreds of other firms, including Mr Huether's Independent Can Co, exposed.

His firm, which employs more than 400 people and takes over $100m (£77m) in annual sales, relies on tin-plated steel from Europe and Canada to make specialty products such as biscuit tins and coffee cans.

The tariffs are expected to add about $1.5m in surprise expense this year. And Mr Huether says they have already cost him one long-time customer, who turned to China amid the uncertainty.

"We need a strong steel industry - no question about it," he says. "But I don't think they've thought through the ramifications."

Image copyright Reuters Image caption Donald Trump says reviving the steel and aluminium industries is vital to national security, but now other firms are in peril

To assuage business concerns, the Commerce Department said it would allow firms to apply for exemptions from the tariffs.

The department rules on the request after a comment period, during which metal producers can object.

Instead of calming debate, however, the procedure has triggered new turmoil, after companies overwhelmed the department with requests.

About 800 businesses, including Independent Can, submitted more than 34,000 petitions, citing issues such as as quality flaws, delivery delays and lack of production in the US.

As of 10 September, officials had decided on more than 4,300 of the requests, approving about 55%.

But the majority of the applications are still pending, leaving Independent Can and many others in limbo.

Image caption Rick Huether says he's had problems with US metal suppliers, including quality flaws and delivery delays

"It's very frustrating. If we could buy domestic, we would buy everything domestic," says Mr Huether, who submitted more than 30 requests and estimates he has spent about $100,000 trying to navigate the process.

"We only went overseas because quality issues domestically forced us."

'Can of worms'

The decision lag has led to fierce lobbying and complaints from Republicans and Democrats alike about a lack of transparency and bureaucratic micromanagement.

Nor has it escaped notice that many of the denials appear to be prompted by objections from steelmakers - an industry with close ties to the administration.

For example, Commerce Secretary Wilbur Ross used to own steel companies, while the head of steelmaker Nucor advised Mr Trump during the 2016 presidential election.

The Commerce Department has twice revised its process, bringing on more staff and expanding the opportunities for manufacturers to respond to the objections, but their frustration remains high.

Image copyright Getty Images Image caption Is this just temporary pain?

"There's no criteria," says Chad Bown, senior fellow at the Peterson Institute for International Economics.

"So of course it opens up a huge can of worms and concerns that for anybody who gets [a waiver], it's favouritism or corruption or just not transparent."

'Adjustment problem'

US Steel, one of the firms that opposed Mr Huether's requests, declined to comment on how the administration is handling the process.

But a company spokeswoman said its expansion plans - it has already restarted one blast furnace and is preparing to restart another - showed it had the ability to meet US demand.

Peter Morici, an emeritus professor at the University of Maryland business school, says politicians are dramatising the problems ahead of US congressional elections in November.

As US steel and aluminium makers boost capacity, the kinds of issues cited by manufacturers should subside, he adds.

"In the near term, there's an adjustment problem," Mr Morici says. "In the longer term, there's no steel that we can't make here."

Image caption Rick Huether worries that higher prices will prompt his customers to turn away from his products and use paper or plastic packaging instead

But many firms can't afford to wait, especially as the surging demand for US-made metals has led to higher prices, says Christine McDaniel, a senior research fellow at the Mercatus Center, a pro-free market think tank housed at George Mason University, who has analysed the requests.

"Eventually this does come out of the bottom line of firms, of shareholders or of consumers. You can't escape it," she says. "And small and medium-sized manufacturers are the ones that are feeling the brunt of this right now."

Companies in Missouri, Indiana, Illinois and elsewhere have announced hundreds of layoffs already. Other firms have scaled back expansion plans or said they will shift work overseas.

Independent Can raised prices in September, breaking with its custom of setting prices at the start of the year.

It is looking to automate lower-skilled jobs, often filled by temporary workers, to reduce expenses.

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Mr Huether says he's not optimistic about winning waivers, especially since the department denied some already after objections from steelmakers.

He's hoping the administration will still work out a deal with allies, like Canada, but the odds of that happening quickly aren't great, says the Peterson Institute's Chad Bown.

The trade deals that Mr Trump has renegotiated - such as the revised North American Free Trade Agreement - have left the tariffs in place, Mr Bown notes.

Independent Can got its start in 1929 when a booming steel industry spawned a cluster of metal-related firms around the port in Baltimore - and is one of the few from that era still standing.

Mr Huether, whose family took it over two decades later, says he shares Mr Trump's goal of reviving blue-collar work, but tariffs aren't the right tool.

"This isn't what they were trying to do," Mr Huether says. "We're a casualty."