President Donald Trump said he would increase tariffs charged to the European Union for cars and trucks to 25%, without saying what authority he would use to raise the levies.

“Based on the fact the European Union is not complying with our fully agreed to Trade Deal, next week I will be increasing Tariffs charged to the European Union for Cars and Trucks coming into the United States,” he wrote on Truth Social on Friday. “The Tariff will be increased to 25%. It is fully understood and agreed that, if they produce Cars and Trucks in U.S.A. Plants, there will be NO TARIFF.”

The Supreme Court ruled in February that a large part of Trump’s tariff agenda was illegal. The president’s “reciprocal” tariffs were invoked using a novel reading of the International Emergency Economic Powers Act, or IEEPA, but the high court said in a 6-3 majority that the law that undergirds those import duties “does not authorize the President to impose tariffs.”

Shortly after the Supreme Court ruling, Trump said he signed an executive order imposing a new 10% “global tariff” rate to effectively replace the IEEPA duties, though those tariffs came with a 150-day time limit under Section 122 of the Trade Act of 1974. He then said he would increase the global rate to 15%.

The EU in February had warned that its trade deal with the U.S. could be in jeopardy after the new tariff rate was announced and postponed its planned vote on the agreement.

The European Union said it is following standard legislative practice and keeping the U.S. administration up to date.

“We maintain close contact with our counterparts, including as we also seek clarity on US commitments,” a a European Commission spokesperson said. “We remain fully committed to a predictable, mutually beneficial transatlantic relationship. Should the US take measures inconsistent with the Joint Statement, we will keep our options open to protect EU interests.”

A White House official said in a statement Friday that the EU has “failed to make substantial progress on their agreed-upon commitments” under a trade agreement between the countries.

“The White House has always been clear that the President reserves the right to adjust tariff rates if our trade deal partners fail to abide by their commitments,” the official said.

The Trump administration last year broadly implemented 25% tariffs on vehicles and certain auto parts imported into the U.S., citing national security risks under Section 232. Those levies are still in place, and the White House said Trump would increase the EU’s levies under Section 232.

The European automakers that could most be impacted by a change in tariff rate would be Mercedes, BMW and Volkswagen, which import a large percentage of the vehicles they sell in the U.S. from their plants in Europe.

President Donald Trump said Friday that his administration gave a “final” bailout proposal for Spirit Airlines as the budget carrier could be forced to liquidate without a lifeline.

Talks with bondholders for a government bailout this week have not yielded a deal as of Friday. The Trump administration last month had offered a $500 million loan that could have given the government up to a 90% stake in the Florida-based airline, according to people familiar with the matter who requested anonymity to speak about the discussions.

“If we could do it, we’d do it, but only if it’s a good deal this weekend, because they haven’t gotten a deal looking at it,” Trump told reporters at the White House on Friday. “I said I’d like to save the jobs but we’ll have an announcement sometime today. … We gave them a final proposal.”

The White House, the Department of Transportation and the Commerce Department didn’t immediate respond to a request for comment.

Spirit declined to comment on liquidation plans. The airline’s lawyer, Marshall Huebner, told a bankruptcy court in New York on April 23 that Spirit’s cash “is not going to last for very much longer.”

The carrier is in its second bankruptcy in less than a year and now has the added challenge of a spike in jet fuel prices amid the Middle East conflict.

United Airlines said the carrier is “preparing to support Spirit customers and employees” if Spirit shuts down and strands crews and passengers, a spokeswoman told CNBC. Other airlines are likely to follow suit.

American Airlines said it has “immediately implemented fare caps on Main Cabin tickets for Spirit routes where we also offer nonstop service and will continue to support as many customers as possible.” JetBlue also said it would provide passengers and crews affected by a potential Spirit shutdown with flight options.

Spirit, which pioneered the low-cost budget airline model, has been challenged for years by rising costs, changing consumer tastes and a engine recall. A planned acquisition of Spirit by JetBlue Airways was successfully challenged by the Biden administration two years ago.

The airline had expected to emerge from bankruptcy midyear before the jump in fuel prices.

Spirit flew around 1.7 million U.S. domestic passengers, with a 3.9% market share in the U.S. market, as of February, according to aviation data firm Cirium. That was down from 5.1% market share last year the airline axed flights to cut costs.