The US Supreme Court said on Monday that Lisa Cook can remain in her position as governor for the Federal Reserve while she contests allegations of mortgage fraud made by President Donald Trump, who fired Cook last August.

Writing for the majority in today’s ruling, Chief Justice John Roberts rejected all four of the Trump administration’s arguments. He stated, “To accept any one of those arguments would in effect transform the Federal Reserve’s for-cause protection into at-will employment — an interpretive leap out of step with the statute Congress enacted and our Nation’s tradition of central banking protected from political interference.”

The US Federal Reserve Act of 1913 allows a president to remove a governor from the Federal Reserve Board for cause. President Trump claimed to have evidence that Cook committed mortgage fraud, a crime in which a homebuyer deliberately misrepresents a second property as a primary residence to get a better interest rate. Cook denies the allegation, which has not been proven at trial. Trump wrote, “[T]here is sufficient reason to believe that you may have made false statements on one or more mortgage agreements,” claiming that this was cause to fire her.

Cook sued to prevent her dismissal. Judge Jia M. Cobb, US District Court for the District of Columbia, granted a preliminary injunction against Cook’s dismissal, which has wound through the appeals process to Monday’s action by the Supreme Court.

President Trump on Monday vowed to fire Cook anyway, posting on Truth Social, “The Cook Lawsuit … was sent back by the Supreme Court on a strictly procedural basis, we will take appropriate action immediately to make sure that someone who has committed wrongdoing will not be making vital decisions concerning the Welfare of the United States of America!”

Over the past year, Trump has repeatedly attacked the Federal Reserve, demanding that it lower interest rates, which he claims are too high and stifling the economy. In April, US District Judge James Boasberg quashed subpoenas that were part of a criminal investigation into Chairman Jerome Powell over renovations to two buildings used by the Federal Reserve. Powell claimed that the investigation was part of a pressure campaign to force him to lower interest rates.