Impeachment as an instrument of check on the Executive is useful mainly in a

Impeachment as an instrument of check on the Executive is useful mainly in a presidential system. In a presidential system, the President is both the Head of State and Head of Government. The President is elected directly by the people and exercises substantial power, which may lead to abuse of power. Impeachment provides a mechanism for the legislature to hold the President accountable for any wrongdoing, such as gross misconduct, abuse of power, or violation of the law. The process involves the initiation of charges by the House of Representatives and a trial in the Senate, with removal from office as the ultimate penalty if the charges are proven. The use of impeachment as a check on the Executive is less applicable in other systems of government, such as the unitary system, where power is centralized in the hands of a single executive, and the cabinet system, where the executive power is exercised collectively by the cabinet.