WASHINGTON - The Trump administration must report today to the U.S. Court of International Trade on how it will refund billions in tariffs collected under emergency powers, while lawmakers simultaneously push for expanded export opportunities for U.S. potatoes in Japan. The developments, unfolding this week, highlight how trade policy, biofuel mandates and regulatory issues are converging to shape the outlook for American farmers and agribusiness.

At stake are roughly $166 billion in tariff collections that could be returned to importers after the U.S. Supreme Court ruled that emergency tariffs imposed under the International Emergency Economic Powers Act were invalid. The decision has major implications for agricultural supply chains, commodity markets and trade negotiations affecting U.S. producers.

The administration faces a 2 p.m. deadline to submit a status report to the U.S. Court of International Trade (CIT) outlining how refunds will be processed. Judge Richard Eaton ordered the report after the Supreme Court struck down the tariff authority that had been used to collect duties on imports. According to a recent filing from U.S. Customs and Border Protection, the agency may begin issuing refunds by late April. Officials say roughly 45 days are needed to build an automated system capable of processing payments to importers.

Government data show CBP collected about $166 billion in tariffs from more than 330,000 importers, funds that must now be repaid with interest. The ruling could reshape trade dynamics across multiple sectors, including agricultural inputs and equipment that rely on global supply chains.

At the same time, more than 60 lawmakers from both parties and chambers of Congress are urging the administration to use an upcoming visit by Japan's prime minister to secure access for U.S. fresh potatoes. The bipartisan effort is being led by Sen. Mike Crapo of Idaho and Sen. Ron Wyden of Oregon, who argue that Japan could become the largest export market for fresh U.S. potatoes outside North America.

In a letter to President Donald Trump, the lawmakers said Japanese officials have delayed negotiations without scientific justification, preventing American growers from accessing a potentially lucrative market.

"We urge you to prioritize this issue in your discussions with the prime minister and find a lasting solution for U.S. potato growers," the lawmakers wrote. The National Potato Council welcomed the congressional push, viewing the diplomatic visit as a potential breakthrough for the industry.

Council CEO Kam Quarles said gaining access to Japan would create "a massive tailwind" for the U.S. potato sector, which is concentrated in states such as Idaho, Washington and Oregon.

Beyond trade disputes, biofuel policy continues to dominate policy conversations in the agricultural sector. The Environmental Protection Agency's final Renewable Volume Obligations (RVOs) - which set biofuel blending mandates under the Renewable Fuel Standard - remain under White House review.

Analysts now expect the final rule to be released after next week, with the administration focused on foreign policy developments. Current proposals call for a 15-billion-gallon ethanol blending mandate for 2026-2027, but the policy is facing pressure from competing interests.

Independent refiners and labor groups argue that ethanol mandates are raising gasoline prices by 20-30 cents per gallon, urging the administration to reconsider the proposed volumes. Meanwhile, biofuel advocates and many Midwestern lawmakers say higher ethanol blends such as E15 can reduce fuel costs and strengthen demand for U.S. corn.

Additional policy developments are adding to the complex regulatory landscape facing U.S. agriculture.

The International Trade Commission has determined that a case alleging Mexican strawberries are being sold below fair market value can proceed, allowing the Commerce Department to investigate potential dumping. At the same time, lawmakers are examining whether to loosen diesel exhaust fluid (DEF) regulations in extremely cold regions after farmers reported equipment failures caused by freezing temperatures. The proposal, known as the Cold Weather Diesel Reliability Act, would allow temporary suspension of certain emissions controls in subzero conditions to prevent machinery shutdowns.

In another biofuel-related development, Chevron agreed to pay a $1 million penalty and retire renewable fuel credits valued at roughly $3.6 million to settle violations of the Renewable Fuel Standard. The Justice Department said the company improperly generated more than 2.2 million renewable fuel credits (RINs) linked to renewable diesel that had already been used to create credits. Officials stressed that maintaining the integrity of the credit system is essential because biofuel programs provide economic benefits to rural communities and agricultural producers.