Necessary and Proper Clause

For everything else, there’s the Necessary & Proper Clause. This part of the Constitution gives Congress the right to pass any law “necessary and proper” for carrying out its other powers, and it is one of the most controversial. At one extreme, interpreters think it gives Congress a near-blank check to pass any law it sees fit. At the other extreme, strict interpretations limit its meaning to laws that are absolutely necessary to carry out powers that are obviously given in the Constitution.