Final answer:
Any law in conflict with the U.S. Constitution is invalid due to the Supremacy Clause. The Necessary and Proper Clause has expanded federal power, and the Supreme Court ensures federal laws aligned with the Constitution take precedence over state laws.
Step-by-step explanation:
Any law, whether it is state, local, or federal, is indeed invalid if it conflicts with the U.S. Constitution. This principle is affirmed by what is known as the Supremacy Clause, found in Article VI of the Constitution.
If a law contradicts the Constitution, that law is considered unconstitutional and therefore cannot be upheld. The Constitution is the ultimate authority and forms the supreme law of the land.
The Necessary and Proper Clause, contrary to limiting the power of the national government, actually provides Congress with the flexibility to pass laws deemed necessary and proper for executing its enumerated powers.
The exercise of these powers through this clause has expanded, rather than limited, federal authority.When federal and state laws conflict, the federal law will generally take precedence if it is in compliance with the Constitution.
This assertion is supported by the role of the Supreme Court, which acts as the interpreter and enforcer of the Constitution in cases of conflict between federal and state laws.
Lastly, the Constitutional Convention of 1787 was indeed convened with the aim of revising the Articles of Confederation. This is a historical fact that underlines the origins of the Constitution and the establishment of the federal government.