The men who wrote the Constitution wanted to ensure that no person or small group could control the government. That’s why they set up three branches of government.
Then they created a system of checks and balances among these branches. Every power the president has is balanced by a different power Congress or the courts have. For example, the president is commander in chief of the armed forces. But only Congress can declare war. Still, over the years, many presidents have added to the powers granted to them in the Constitution.
