The Boston-based firm said while it supports Trump’s efforts to force China to address intellectual property theft in a trade deal, its U.S. factories are supported by a global supply chain connected to China and built over decades. Duties on soles and other components would hurt the business, as do China’s retaliatory tariffs on U.S. exports, the company said.

Trump’s proposed levies “will not just translate into higher costs, but jeopardize our ability to maintain production levels and continue investing in our domestic factories,” New Balance Vice President Monica Gorman said in comments posted online.

The footwear firm is among the U.S. companies lining up for the hearing to drive home a now-common point: Trump’s proposed tariffs are bad for business. But the stakes have never been higher, with the latest wave of threatened duties set to hit essentially all remaining imports from China including mobile phones, laptops, apparel and other consumer items.

Tariffs, prices

New Balance has long pushed to supply U.S.-made shoes to the Pentagon and argued against reducing tariffs on imported finished footwear when the U.S. was negotiating the Trans-Pacific Partnership with 11 other nations earlier this decade. But Trump withdrew from the TPP in 2017, and his use of tariffs on goods and components has drawn opposition from a swath of U.S. companies and industries.

About 320 officials from U.S. manufacturers, retailers and other companies and trade groups are set to appear over seven days of a hearing. While some companies including Rheem Manufacturing Co. support the duties, most are arguing that Trump shouldn’t tax their products.

While Trump likes to say China is paying the tariffs, economists say it’s U.S. importers that pay them and some of that gets passed to consumers in higher prices. Companies also say they can’t easily avoid them by moving operations outside China, as the president suggests.

It’s the fourth round of hearings, after Trump levied duties on $250 billion of products last year. As talks on a trade deal with China faltered last month, he ordered a tariff increase to 25% from 10% on $200 billion of goods and targeted an additional $300 billion in products — including consumer goods the administration tried to spare in previous rounds.

Hallmark, Forever 21

Some executives are coming to Washington to testify for the fourth time, even though many don’t have much hope of success given that Trump sees tariffs as “beautiful” and leverage for a deal — especially after he said the threat of duties on Mexico produced an immigration pact. Some firms got goods removed from previous tariff lists, only to have them put back.

Retailers including Best Buy Co. Inc., Jo-Ann Stores LLC and Forever 21 Inc. have asked to testify against duties on goods including computer tablets, smartwatches and artificial plants. Hallmark Cards Inc. said greeting cards and Christmas ornaments should be spared because of the impact on retailers, consumers and even the U.S. Postal Service.

Technology products account for more than half the value of the $300 billion, which will raise prices for consumers and could prove “catastrophic” — especially for small- and medium-size firms, the Consumer Technology Association said.

Christmas Grinch

Almost a quarter of the more than 3,800 targeted tariff lines involve goods such as textiles, apparel and footwear, according to the American Apparel & Footwear Association. That’s attracted objections from companies including Ralph Lauren Corp., Columbia Sportswear Co. and Designer Brands Inc.

The proposed duties have also drawn opposition from companies that sell products including eyeglasses, fireworks, books, art, vinyl gloves, skis, fishing equipment, seafood, baby cribs and toys.

“Look out, American toy shoppers here comes the Grinch That Tariffed Christmas!” Wendy Lazar, the founder of I Heart Guts plush toy company in California, posted online.

The tariffs could be imposed after a seven-day rebuttal period following the last day of the hearings.

Trump is still waiting for a response from Chinese President Xi Jinping about meeting to restart trade talks, economic adviser Larry Kudlow said last week, while warning that Beijing may face consequences it if refuses. Trump has repeatedly threatened to raise tariffs if Xi doesn’t meet with him at the G-20 leaders’ meeting from June 28-29 in Osaka, Japan.

Commerce Secretary Wilbur Ross downplayed the prospect of a major trade deal emerging from a possible meeting between the two presidents, telling the Wall Street Journal in an interview Sunday that the most he thinks will happen is an agreement to resume talks.

Walmart Inc., Target Corp., Macy’s Inc. were among about 660 companies and associations that made a plea last week to Trump not to impose additional tariffs on Chinese goods, and to return to the negotiating table to strike a trade deal with Beijing.