Presidential democracy is a system of government where a president serves as both the head of state and the head of government. In this system, the president is elected by the people and holds significant powers, including the ability to enforce laws, manage the executive branch, and represent the country in foreign affairs. This structure often includes a separation of powers among the executive, legislative, and judicial branches to prevent any one branch from becoming too powerful. In a presidential democracy, elections are typically held at regular intervals, allowing citizens to choose their leaders. Countries like the United States and Brazil exemplify this system, where the president is accountable to the electorate. This form of governance promotes direct representation and can lead to a more stable political environment, although it may also result in conflicts between the president and the legislature.