What is the impact of the necessary and proper clause?

The Necessary and Proper Clause gives Congress broad authority to pass laws that help carry out its enumerated powers under the Constitution. This clause basically says that if the Constitution grants Congress a power, then Congress can use any means it wants to exercise that power, as long as those means are not specifically prohibited by the Constitution itself.

For example, the Constitution gives Congress power over interstate commerce. Under the Necessary and Proper Clause, Congress can pass any laws that help regulate interstate commerce, like laws on transportation, communication, business, etc. Congress has wide discretion on what methods it chooses.

The purpose is to give Congress flexibility in implementing its express powers. Without the Necessary and Proper Clause, Congress would be very limited if it could only use means that are directly mentioned in the Constitution. This clause allows Congress to stay adaptable and responsive in regulating national issues.