Under the U.S. Constitution, power is distributed among the levels of government in a way that is very different from the way it was distributed under the Articles of Confederation.
Under the Articles of Confederation, the national government was weak and had very limited powers. It was unable to levy taxes or regulate commerce, and it had no executive branch to enforce its decisions. The states, on the other hand, had a great deal of power and were largely independent of one another.
Under the U.S. Constitution, the national government is much stronger and has a greater range of powers. It is able to levy taxes and regulate commerce, and it has an executive branch headed by the president that is responsible for enforcing the laws of the United States. The states, while still retaining some independence and power, are more closely tied to the national government and are required to follow federal laws and regulations.
Overall, the U.S. Constitution distributes power more evenly among the levels of government and creates a more balanced system of federalism, while the Articles of Confederation gave much more power to the states and created a weaker national government.