Congressional oversight of executive branch officials is fundamental to our democracy and our constitutional system of checks and balances — a system the Trump administration appears determined to delegitimize. The Trump White House’s blanket refusal to comply with congressional requests and subpoenas isn’t just unprecedented. It signals a dangerous vision of a presidency left unchecked and unscrutinized. American Oversight is examining executive branch agencies’ defiance of congressional investigations — and whether those agencies have been acting at the direction of the White House.