FrancophonIA/Vikidia-EnFr huggingface dataset:
A president is the leader of a country or a company or other group. A president is usually elected by the people in that group. Voting is one way to elect a president.

The President of the United States is elected by the electoral college. Some other countries choose a president this way. In some, the Parliament does it. Some countries have direct elections to choose a president. Many countries have a monarch instead of a president and some have neither.

Companies have presidents. They are elected by the people who own part of the company. In some companies, the people who are workers for the company elect (vote for) their company president.

The president of a country is not the same thing as a prime minister. A prime minister is part of a parliament, but a president is not. In some countries, (such as the United States or France), the president has more power and responsibility than anyone else. Such a president is often called the nation's chief executive. As chief executive, the president must take an active role in all phases of government. In other countries (such as the Republic of Ireland or Israel), to be president is more of an honor or a symbol, and the position has no real power. This kind of president is often called "head of state".

Most countries that have a King or Queen as their monarch have no president.

The American President is restricted by the written United States Constitution, which can be changed but only if two-thirds of Congress as well as the President and three-fourths of the states agree to it.  The constitution was written to make sure that the American executive never became as powerful as in the British system it had broken away from.  The British Prime Minister is part of both the Legislature and Executive, whereas the American President is the head of the Executive. The American governmental system shows a clear separation of powers unlike the British system.

So despite having a large nuclear arsenal, the American president can not carry out policy and introduce legislation as freely as the British prime minister.