How nuclear fusion creates energy radiation that eventually reaches earth

The serious difficulty for the national government under the Articles of Confederation is "It lacked the authority to raise money to support itself ".

Explanation:

The Article of Confederation gave away most of the power to the state and federal government had only limited control over the state. Particularly this article made a power less national government during the American Revolution.  

The American states were of the opinion that if the strong national government is there in the central means it may affect the autonomy of the states.

So the states were strongly objected to the formation of strong central government and felt that the most decision making power should be with them.

The downfall of The Article of confederation was simply because it has no power to make laws to control the states.