Final answer:
Two methods included in the Constitution to limit the power of the national government are the necessary and proper clause and the enumeration of powers.
Step-by-step explanation:
Two methods included in the Constitution to limit the power of the national government are the necessary and proper clause and the enumeration of powers. The necessary and proper clause, also known as the elastic clause, is found in Article I, Section 8 of the Constitution. It grants Congress the power to make laws that are necessary and proper to carrying out its other powers. This allows the national government to adapt its powers and policies as needed. The enumeration of powers is found in Article I, Section 8 as well. It lists specific powers that are granted to the national government, such as the power to coin money, regulate commerce, and declare war. By specifying these powers, the Constitution limits the scope of the national government's authority.