Federal Reserve Governor Stephen Miran resigned on Tuesday as chair of the White House Council of Economic Advisers (CEA), honoring a pledge to the Senate after his temporary assignment to the Fed became longer-term. Miran had been on unpaid leave from the CEA since President Donald Trump appointed him last year to fill a vacant Fed Board of Governors seat, a term that expired January 31. Critics, particularly Democratic Senators, argued the arrangement risked making the Fed a “presidential puppet.”

In his resignation letter, Miran emphasized keeping his word: “I promised the Senate that if I should stay on the Board past January, I would formally depart the Council. I believe it is important to stay true to my word while I continue to perform the job at the Federal Reserve to which you and the Senate appointed me.”

Trump announced plans to nominate former Fed Governor Kevin Warsh to succeed Jerome Powell as Fed chair. While Warsh’s confirmation would eventually fill the seat currently held by Miran, the law allows Miran to serve until a successor is confirmed. The White House has not commented on whether Pierre Yared, now acting chair of the CEA, will be appointed permanently.

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During his tenure at the Fed, Miran consistently advocated for sharply lower interest rates, aligning with Trump’s public push for easier monetary policy. Powell, whose leadership term ends in May, revealed in January that the Department of Justice (DOJ) had launched a criminal probe into statements he made to the Senate regarding Fed building renovations, which he has framed as political pressure from the administration.

The DOJ previously investigated Fed Governor Lisa Cook for alleged misstatements on her mortgage application; she denies wrongdoing and is challenging Trump’s attempt to remove her in a case now before the Supreme Court. Many Senate Banking Committee members, including all Democrats and one Republican, have criticized the DOJ’s investigation of Powell as political intimidation and expressed opposition to moving forward on Warsh’s nomination while the probe continues.