In the long and often uneasy relationship between American presidents and their central banks, Donald Trump's public rebuke of the Federal Reserve marks another chapter in a story older than any single administration — the tension between political will and institutional independence. Trump's frustration sharpened this week when Kevin Warsh, a figure under consideration for a senior Fed role, publicly endorsed raising interest rates, a position at odds with the president's longstanding preference for cheap credit and easy growth. The episode reveals not only a fracture between the White House