"No matter how worthwhile an end may be, if there is no constitutional authority to pursue it, then the federal government must step aside and leave the matter to the states or to private parties. The president and Congress can proceed only from constitutional authority, not from good intentions alone. If Congress thinks it necessary to expand its powers, the Framers crafted an amendment process for that purpose. But too often, rather than follow that process, Congress has disregarded the limits set by the Constitution and gutted our frontline defense against overweening federal government."

—Robert Levy, Senior Fellow in constitutional studies at the Cato Institute.