Answer:
This is directly from Wikipedia so change your wording on it or it'll be plagiarism.
Step-by-step explanation:
"In its ruling, the Supreme Court established firstly that the "Necessary and Proper" Clause of the U.S. Constitution gives the U.S. federal government certain implied powers that are not explicitly enumerated in the Constitution, and secondly that the American federal government is supreme over the states, and so states' ability to interfere with the federal government is limited."