Presidential system

A presidential system is a special way that countries can be run. In this system, a person called a president leads the government. This president is also usually the leader of the country.

The president gets their power from the people who vote for them. This is different from another system called a parliamentary system, where the leader gets their power from the group of leaders called the legislature.

The presidential system became well known because of the Constitution of the United States. It started when leaders in the early United States chose this way of governing. Today, many countries use this system. It is most common in the Americas and also used in places like Sub-Saharan Africa, South Korea, Syria, the Philippines, and Indonesia. However, it is not very common in Europe, where only Cyprus and Turkey use it.

History

Development in the Americas

The presidential system started in the 1600s in the British colonies that are now the United States. The Pilgrims in Plymouth Colony chose a governor each year, like leaders in governments today. They also picked other leaders for different jobs.

The first true presidential system began during the United States Constitutional Convention in 1787. The delegates looked at older colonial ways, English Common Law, and ideas from thinkers like John Locke and Montesquieu. The Constitution of the United States started in 1789, making the United States the first presidential republic, with George Washington as its first president.

In the 1800s and 1810s, many Spanish colonies in Latin America became independent and used the presidential system, copying the United States. Brazil also changed to a presidential system in 1889, with Deodoro da Fonseca as its first president. Some of these countries had trouble with their governments and leaders.

As a global system

The Philippines set up the first presidential system in Asia in 1898, but it was under American control after the Spanish–American War. The system returned when the Philippines became independent in 1946.

After World War II, the United States helped South Korea start a presidential government. Indonesia also became independent in 1945 and used a presidential system.

During the 1950s and 1960s, many new countries after decolonization chose the presidential system, including in Africa, Cyprus, the Maldives, and South Vietnam. Pakistan and Bangladesh also tried it but later changed their systems.

More countries used the presidential system in later years. A changed version was used in Iran after 1989. Palau became independent in 1981 and chose the presidential system. After the Soviet Union broke up in 1991, many new countries tried the system, though most later changed to different kinds of government.

Recently, the presidential system has kept growing. South Sudan adopted it after becoming independent in 2011. Turkey changed to a presidential system in 2018. In 2025, Syria also started a presidential system.

Features

The presidential system is special because the leader, called the president, is separate from the lawmakers. The president is chosen by the people and works on its own.

Portrait of James Wilson, who largely designed the powers of the president of the United States.

The president can veto laws, forgive crimes, lead in foreign affairs, and manage government employees. This separation helps each part of the government check the others. This can prevent any one group from having too much power. However, it can also cause problems if the president and lawmakers disagree. This can make it hard to pass new laws.

Presidential systems have fixed terms. This means the president serves for a set time before facing re-election. This can bring stability but may make it hard to remove a president who is not working well until the next election.

Paradoxes

Presidential systems sometimes get criticized because they have contradictions. Leaders get power, but rules limit that power. This can cause tension. Elections for president are usually "winner-takes-all." One side gets all the control, which can lead to more fighting and division among groups.

Presidential systems aim to create a strong leader who represents the whole nation. But they also have rules to stop too much power, like limits on how long a president can serve. This mix can make decision-making hard and cause stress in the government.

Compared to systems where a group of lawmakers choose the leader, presidential systems can be less flexible. If something unexpected happens, like a president leaving office early, it can cause problems. In other systems, leaders can often fix things by voting or holding new elections. But in presidential systems, changing leaders can lead to big problems.

Zero-sum election

One problem with presidential elections is that they are often “winner-takes-all.” The winner gets all the power, which can make political battles very fierce. This can turn politics into a battle where one side tries to take everything from the other.

In systems where leaders are chosen by groups of lawmakers, parties often share power. This helps calm down fights because parties must work together. But presidents may feel they have full permission to lead, even if they only won by a small amount. This can make it harder for them to work with others.

Some countries have found ways to share power even with presidential systems. For example, in Venezuela and Colombia, parties sometimes agree to share power to keep things stable, showing that presidential systems can adapt but still face challenges.

The Spanish example

When Spain held its first free elections in 1977 after a period of strict rule, it used a system where leaders are chosen by a group of lawmakers. No single group had a majority, so parties had to work together. If Spain had used a presidential system instead, things might have been very different and more divisive.

Without a clear majority, building a coalition would have been difficult and uncertain. Both the left and right would have had to make risky alliances, which could have caused confusion and pushed away voters.

Spain’s choice to use a parliamentary system helped parties work together and change slowly over time. This helped the country build a stable democracy, showing that systems where leaders are chosen by lawmakers can reduce fighting and help nations change peacefully.

Comparative politics

The main difference between a presidential system and a parliamentary system is that in a presidential system, the head of government is elected separately from the legislature. In a parliamentary system, the head of government must answer to the legislature. Presidential systems always have a clear separation of powers.

Sometimes, a country may use a mix of both systems, called a semi-presidential system. In this system, both an elected president and a prime minister share power.

Presidentialism metrics

Presidentialism metrics help compare how strong the presidential system is in different countries. These metrics include the presidential index in V-Dem Democracy indices and presidential power scores. The table below shows the V-Dem presidential index for individual countries.

Subnational governments

Some local or state governments use a presidential system even if their country does not. For example, all state governments in the United States use a presidential system, with the leader called a Governor instead of a President. Similarly, on a local level, a mayor may act like a president. Some countries, like Japan, use a parliamentary system nationally but may have presidential-like systems in their local governments.