Congress has built a network of internal and external watchdogs to check the executive branch. Some work inside agencies, some report to Congress, and some protect employees who expose wrongdoing. Their effectiveness depends on independence, access to information, and political support.
This guide explains each kind of watchdog, how they work, and the debates over their independence.
The Inspector General Act of 1978, passed after Watergate, created independent offices inside major agencies to conduct audits and investigations and to report problems to the agency head and Congress. Presidentially appointed inspectors general are confirmed by the Senate, and others are appointed by agency heads. They identify waste and fraud, recommend improvements, and refer criminal cases to prosecutors, and the Council of the Inspectors General on Integrity and Efficiency coordinates their work. Many have armed criminal investigators.
The Office of Government Ethics sets conflict-of-interest and financial disclosure rules for the executive branch, while agency ethics officials advise employees. The Whistleblower Protection Act of 1989 and later laws protect employees who report wrongdoing, and intelligence community whistleblowers use separate channels. The Merit Systems Protection Board hears appeals of retaliation claims. Congress has its own watchdogs, including the Office of Congressional Conduct in the House and ethics committees in each chamber.
Watchdog offices report that their recommendations save tens of billions of dollars a year, and supporters say independence is what makes them credible. Critics of their independence argue that they sometimes pursue political agendas and that Presidents, who are accountable for their agencies, must be able to choose their overseers, a view strengthened by the Supreme Court's removal decisions. Proposals include for-cause protection for inspectors general, fixed terms, and guaranteed budgets, while others favor more presidential control.
The Government Accountability Office, created in 1921 as the General Accounting Office, works for Congress, auditing federal spending, evaluating programs, and publishing hundreds of reports a year, including a High Risk List of programs vulnerable to waste. It is led by the Comptroller General, who serves a single 15-year term. Under the Impoundment Control Act, GAO decides whether agencies have unlawfully withheld appropriated funds, and in 2025 it issued several findings that the administration had violated the act, which the administration disputed.
The U.S. Office of Special Counsel, distinct from Justice Department special counsels who handle criminal investigations, is an independent agency that protects federal employees from retaliation for whistleblowing and other prohibited personnel practices. It receives whistleblower disclosures and refers them to agencies, and it enforces the Hatch Act, which bars most federal employees from using their positions for partisan politics. Its head was removed in February 2025, prompting litigation over whether the office's removal protection was constitutional.
The President can remove an inspector general but must give Congress 30 days' notice and a substantive reason, rules Congress strengthened in 2022. On January 24, 2025, the President removed about 17 inspectors general at once without notice. Several sued, and in September 2025 a federal judge ruled the firings violated the law but declined to reinstate them. Supporters said the President needs inspectors general he trusts, while critics, including some Republican senators, said the removals weakened oversight. Many offices were led by acting officials for months.
See how Congress investigates in how Congress investigates, learn about agency structure in the administrative state explained, or follow the money in where your tax dollars go.