The United States Constitution addressed the problem under the Articles of Confederation that Congress had no power to ensure its laws were followed by the states by creating an executive branch of government,
The Articles of Confederation came before the United States Constitution, but it was very weak and gave little power to the national government. Under the Articles, the government could not tax the states, create and enforce laws properly, draft soldiers, regulate trade, and other important things the government needed to do.
Eventually, people started to realize how the Articles of Confederation was hurting the country and they needed something more powerful, these people were called Federalists. On the other hand, the people who were in favor of the Articles of Confederation and wanted to keep a weak national government were called Anti-Federalists, they were scared of tyranny.
The Constitutional Convention of 1787 was originally planned to just amend the Articles of Confederation, but they ended up getting scrapped altogether. The United States Constitution was created instead and addressed numerous problems that were evident in the Articles of Confederation.
One of these problems was that Congress had no power to ensure that laws were being followed by the states. Not only this, but since the national government had no power to tax, they had no money to raise an army or have anybody enforce anything if things got out of hand. The solution to this was creating the executive branch. When Congress passed a law, it was the state government's job to enforce it onto the citizens, but this rarely happened. The executive branch was now the branch to enforce laws, while the Congress makes them.
