The White House’s latest criticism of Fed Chair Jerome Powell, over building renovations, marks a broader push by President Trump to exert pressure on the independent central bank. In a response to Fortune, Federal Reserve Bank of St. Louis president Alberto Musalem defended the institution’s autonomy, citing global evidence that independent central banks deliver stronger inflation and employment outcomes.

As well as penning letters to hundreds of world leaders this week, the White House also found time to write to Fed Chair Jerome Powell, criticizing his leadership.

The president’s top budget advisor, Russell Vought, revealed yesterday he wrote to the Federal Reserve boss saying the president is “extremely troubled” by the Fed’s office building renovations, claiming Powell is “grossly mismanaging” the institution.

The letter blasting the “ostentatious overhaul” (which Vought wrote is over budget to the tune of $700 million) comes as an escalation—or a change in tack—in the White House’s ongoing battle with the Federal Open Market Committee and more specifically, its leader.

Despite a push from Trump 2.0 for efficiency, Vought’s questioning is, to some extent, at odds with the Federal Reserve Act, which gives authority to the Fed to maintain or change its buildings when it deems necessary.

It reads: “The Board of Governors of the Federal Reserve System shall have power to levy semiannually upon the Federal Reserve banks, in proportion to their capital stock and surplus, an assessment sufficient to pay its estimated expenses … Its judgment alone shall be necessary for the purpose of providing suitable and adequate quarters for the performance of its functions.

“The Board may maintain, enlarge, or remodel any building or buildings so acquired or constructed and shall have sole control of such building or buildings and space therein.”

Even before President Trump and JD Vance won the presidential election, the duo were hinting they wanted more of a say in how the federally mandated independent Fed is run—and criticism of Powell has ramped up since then.

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