(TJV NEWS) President Donald Trump announced Saturday that he is increasing global tariffs to 15%, up from 10%, just one day after the Supreme Court invalidated a major portion of his trade policy, as CNBC reported.

In a post on Truth Social, Trump declared the higher tariffs would take effect “immediately” and signaled that further trade measures could soon follow.

“I, as President of the United States of America, will be, effective immediately, raising the 10% Worldwide Tariff … to the fully allowed, and legally tested, 15% level,” Trump wrote, arguing that many countries had taken advantage of the U.S. economically for decades.

He added that over the coming months, his administration would outline additional “legally permissible” tariffs.

Despite the president’s claim that the increase is effective right away, it remains unclear whether formal documentation has been completed specifying the timing of the new 15% rate. A White House fact sheet issued Friday stated that the original 10% global tariff would begin Tuesday at 12:01 a.m. ET. The White House did not immediately respond to requests for clarification, CNBC reported.

The announcement follows a significant setback at the Supreme Court. In a 6–3 decision Friday, the justices ruled that Trump improperly relied on the International Emergency Economic Powers Act (IEEPA) to impose sweeping tariffs. The ruling struck down a central component of his trade strategy.

Within hours of the decision, Trump moved to reassert his authority by announcing a 10% global tariff under Section 122 of the Trade Act of 1974. That statute permits a president to impose temporary tariffs for up to 150 days, though any extension requires congressional approval, according to CNBC’s reporting.

Trump sharply criticized the high court’s ruling, calling it “ridiculous, poorly written, and extraordinarily anti-American” in a social media post. He also singled out Justices Neil Gorsuch and Amy Coney Barrett, both conservatives, who joined the majority opinion.

The political fallout was swift. Congressional Democrats celebrated the ruling, with Senate Minority Leader Chuck Schumer calling the tariffs “chaotic and illegal.” Democrats are expected to highlight tariffs and broader economic concerns as key campaign issues heading into November’s midterm elections.

Republicans appeared more divided. Some GOP lawmakers condemned the court’s decision, while others emphasized that the Constitution grants Congress authority over trade policy and tariffs.

Financial markets reacted with volatility Friday. Stocks initially surged following the Supreme Court’s decision, then gave up gains before rebounding later in the session. Investors appeared to interpret the ruling as potentially easing trade tensions with U.S. partners and possibly reducing inflationary pressures, as CNBC reported.

Another major unresolved issue is refunds. Analysts estimate the federal government could owe more than $175 billion to importers if previously collected tariffs are returned as a result of the court’s decision. How the administration would handle such repayments remains uncertain.

Trump is scheduled to deliver his State of the Union address to Congress on Tuesday, where trade policy and the court’s rebuke are likely to feature prominently.