WASHINGTON (AP) — Jerome Powell said Wednesday he plans to remain on the board of the Federal Reserve after his term as chair ends next month “for an undetermined period of time,” saying the “unprecedented” legal attacks by the Trump administration have put the independence of the nation’s central bank at risk.

“I worry these attacks are battering this institution and putting at risk the things that really matter to the public,” Powell said in remarks at a press conference after the Fed announced its decision to keep its benchmark interest rate unchanged.

Powell’s decision to stay — the first time a Fed chair will remain on the board as a governor since 1948 — denies President Donald Trump a chance to fill a seat on the central bank’s seven-member governing board with his own appointee. The Senate Banking Committee earlier approved Powell’s successor as chair, Trump appointee Kevin Warsh, on a party-line vote. Powell will continue as a Fed governor, possibly until January 2028. Warsh, if confirmed, will take a seat currently held by Stephen Miran, a previous Trump appointee, whose term ended in January.

Powell’s move could make it a bit harder for Warsh to engineer the rate cuts that Trump has demanded, and Warsh advocated for last year, economists say.

“It probably means it will take Warsh a little bit longer to build the consensus he is trying to build,” said David Seif, chief economist for developed markets at Nomura, an investment bank.

U.S. Attorney for the District of Columbia Jeanine Pirro said on X Friday that her office was ending its probe into the Fed’s extensive building renovations because the Fed’s inspector general would scrutinize them instead. But she added that her office could reopen the investigation if “the facts warrant doing so.” And Pirro had said previously that she would appeal a court ruling that threw out subpoenas her office had issued.

Powell said Wednesday he had been assured by the Justice Department that the appeal wouldn’t result in a reopening of the probe unless a separate investigation by the Fed’s inspector general finds evidence of criminal activity.

Apparently, that didn’t bring Powell the closure he felt is needed.

“I’m waiting for the investigation to be well and truly over with finality and transparency,” he said. “I’m waiting for that and I will leave when I think it appropriate to do so.”

The Fed Wednesday left its benchmark interest rate unchanged for the third straight meeting but signaled it could still cut rates in the coming months, moves that attracted the most dissents since October 1992. Three officials dissented in favor of removing the reference to a future cut, while a fourth, Miran, dissented in favor of an immediate rate cut.

The dissents underscore the level of division on the Fed’s 12-member rate-setting committee ahead of the end of Powell’s term as chair on May 15.

“Developments in the Middle East are contributing to a high level of uncertainty about the economic outlook,” the Fed said in a statement after its two-day meeting. “Inflation is elevated, in part reflecting the recent increase in global energy prices.”

Warsh has promised “regime change” at the central bank and may make sweeping changes to its economic models, communications strategies, and balance sheet. He has argued in favor of rate cuts, as Trump has demanded, but he will likely find it harder to implement them with inflation topping 3%, above the Fed’s target of 2%.

When asked if he believed Warsh would stand up to political pressure from Trump, Powell answered, “He testified very strongly at his hearing, and I take him at his word.”

The three officials who dissented against hinting that the Fed may reduce borrowing costs were Beth Hammack, president of the Federal Reserve Bank of Cleveland; Neel Kashkari, president of the Minneapolis Fed; and Lorie Logan, president of the Dallas Fed. The regional Fed bank presidents have historically been more likely to dissent, while the Washington-based governors more often support the chair.

The dissents could renew tension between the Trump administration and the bank presidents, who White House officials have previously criticized.