The Justice Department's January 2026 criminal investigation into Fed Chair Jerome Powell—centered on his Senate testimony regarding the central bank's $2.5 billion headquarters renovation—was dropped without charges in April 2026 amid rulings that found insufficient evidence. This episode highlighted tensions between monetary policy independence and executive branch preferences on interest rates, with Powell publicly attributing the probe to pressure over the Fed's data-driven rate path versus administration demands. Traders monitoring related Polymarket contracts should note the absence of ongoing proceedings, Powell's continued emphasis on inflation and labor market data, and any near-term FOMC communications or term-end developments that could test institutional boundaries, though market-implied odds reflect the resolved status and low likelihood of renewed action.