A 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 are examples of presidential democracies, where the president is accountable to the electorate. This system encourages political participation and can lead to a more direct connection between the government and its citizens.