U.S. Federal Reserve Chair Jerome Powell departs following his final press conference following a two-day meeting of the Federal Open Market Committee (FOMC), at the U.S. Federal Reserve in Washington, D.C., U.S., April 29, 2026. Kevin Lamarque | Reuters How do you change regimes when the head of the old one isn't leaving? That will be the question facing Federal Reserve chair nominee Kevin Warsh next month once confirmed by the Senate , now that outgoing Chair Jerome Powell has confirmed he will stick around indefinitely as a voting member of the Fed's Board of Governors. Powell's decision to stay has little precedent in Fed history, but it may be less disruptive to Warsh's plans than it might otherwise seem. Powell said at a Wednesday press conference that he has no desire to be a "shadow chair" and that his plans for an extended tenure at the Fed are aimed squarely outside the infamously crumbling walls of the Marriner S. Eccles headquarters building .…