Federal Reserve Chair Jerome Powell has told multiple associates and allies that there’s no chance he will bow to President Donald Trump’s calls for him to resign, vowing to withstand several more months of the president’s unprecedented,

President Donald Trump locked horns with Federal Reserve Chair Jerome Powell during a rare presidential visit to the U.S. central bank on Thursday, criticizing the cost of renovating two historical buildings at its headquarters and pressing the case for lower interest rates.

The administration has repeatedly criticized Jerome H. Powell, the chair of the central bank, for his handling of the economy and the cost of work on the institution’s headquarters.