WASHINGTON (AP) — For weeks, President Donald Trump was promising the world economy would change on Friday with his new tariffs in place. It was an ironclad deadline, administration officials assured the public.

But when Trump signed the order Thursday night imposing new tariffs, the start date of the punishing import taxes was pushed back seven days so the tariff schedule could be updated. The change in tariffs on 66 countries, the European Union, Taiwan and the Falkland Islands was potentially welcome news to countries that had not yet reached a deal with the U.S. It also injected a new dose of uncertainty for consumers and businesses still wondering what’s going to happen and when.

Trump told NBC News in a Thursday night interview the tariffs process was going “very well, very smooth.” But even as the Republican president insisted these new rates would stay in place, he added: “It doesn’t mean that somebody doesn’t come along in four weeks and say we can make some kind of a deal.”

Trump has promised that his tax increases on the nearly $3 trillion in goods imported to the United States will usher in newfound wealth, launch a cavalcade of new factory jobs, reduce the budget deficits and, simply, get other countries to treat America with more respect.

The vast tariffs risk jeopardizing America’s global standing as allies feel forced into unfriendly deals. As taxes on the raw materials used by U.S. factories and basic goods, the tariffs also threaten to create new inflationary pressures and hamper economic growth — concerns the Trump White House has dismissed.

Questions swirl around the tariffs despite Trump’s eagerness

As the clock ticked toward Trump’s self-imposed deadline, few things seemed to be settled other than the president’s determination to levy the taxes he has talked about for decades. The very legality of the tariffs remains an open question as a U.S. appeals court on Thursday heard arguments on whether Trump had exceeded his authority by declaring an “emergency” under a 1977 law to charge the tariffs, allowing him to avoid congressional approval.

Trump was ebullient as much of the world awaited what he would do.

“Tariffs are making America GREAT & RICH Again,” he said Thursday morning on Truth Social.

Others saw a policy carelessly constructed by the U.S. president, one that could impose harms gradually over time that would erode America’s power and prosperity.

“The only things we’ll know for sure on Friday morning are that growth-sapping U.S. import taxes will be historically high and complex, and that, because these deals are so vague and unfinished, policy uncertainty will remain very elevated,” said Scott Lincicome, a vice president of economics at the Cato Institute. “The rest is very much TBD.”

The new tariffs build off ones announced in the spring

Trump initially imposed the Friday deadline after his previous “Liberation Day” tariffs in April resulted in a stock market panic. His unusually high tariff rates announced then led to recession fears, prompting Trump to impose a 90-day negotiating period. When he was unable to create enough trade deals with other countries, he extended the timeline and sent out letters to world leaders that simply listed rates, prompting a slew of hasty agreements.

Swiss imports will now be taxed at a higher rate, 39%, than the 31% Trump threatened in April, while Liechtenstein saw its rate slashed from 37% to 15%. Countries not listed in the Thursday night order would be charged a baseline 10% tariff.

Trump negotiated trade frameworks over the past few weeks with the EU, Japan, South Korea, Indonesia and the Philippines — allowing the president to claim victories as other nations sought to limit his threat of charging even higher tariff rates. He said Thursday there were agreements with other........

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