Charles Evans Hughes, Currin v. Wallace — Opinion of the Court
“ It is of the essence of the plenary power conferred that Congress may exercise its discretion in the use of the power. Congress may choose the commodities and places to which its regulation shall apply. Congress may consider and weigh relative situations and needs. Congress is not restricted by any technical requirement but may make limited applications and resort to tests so that it may have the benefit of experience in deciding upon the continuance or extension of a policy which under the Constitution it is free to adopt. ”
