Senator Elizabeth Warren sent a letter to JPMorgan Chase CEO Jamie Dimon asking him to explain the bank's relationship with Jeffrey Epstein and what Dimon himself knew about those ties, citing questions raised by the recently released Epstein files. The letter escalates ongoing scrutiny of JPMorgan's decades-long banking relationship with Epstein and marks a formal Senate Banking Committee investigation into both the bank's conduct and Dimon's personal knowledge. Multiple outlets confirm Warren is the top Democrat on the Banking Committee and that the Epstein files were released earlier in 2026, making this the first documented formal congressional demand for answers on the subject.