Stanley Forman Reed,
Cloverleaf Butter Co. v. Patterson…
“ It is one thing for courts in interpreting an Act of Congress regulating matters beyond state control to construe its language with a view to carrying into effect a general though unexpressed congressional purpose. It is quite another to infer a purpose, which Congress has not expressed, to deprive the states of authority which otherwise constitutionally belongs to them, over a subject which Congress has not undertaken to control. ”
