How has the U.S. Congress maintained oversight of the executive branch?

The U.S. Congress maintains oversight of the executive branch through a variety of constitutional powers and institutional mechanisms designed to ensure accountability and prevent the abuse of power.12

Key methods of congressional oversight include:

• Fiscal Control: Congress holds the exclusive power to appropriate funds, allowing it to influence or restrict executive activities by controlling the budget. The Government Accountability Office (GAO) serves as a vital tool in this process, monitoring executive expenditures and evaluating the effectiveness of government programs.123
• Confirmation and Ratification: The Senate must provide its consent for presidential appointments, including Supreme Court justices and other high-level executive officials, and it must approve treaties.2
• Investigative Powers: Congress utilizes public hearings, the committee system, and investigative inquiries to scrutinize executive policies and administrative actions.12
• Impeachment: Congress possesses the authority to impeach and remove executive and judicial officials for misconduct.12
• Legislative Checks: Congress can override presidential vetoes with a two-thirds vote and may initiate constitutional amendments to address judicial or executive actions.2

These practices are fundamental to the system of checks and balances, ensuring that no single branch of government becomes too powerful.2