by John Marshall Harlan, Scranton v. Wheeler — Opinion of the Court
“ Undoubtedly compensation must be made or secured to the owner when that which is done is to be regarded as a taking of private property for public use within the meaning of the 5th Amendment of the Constitution; and of course in its exercise of the power to regulate commerce Congress may not override the provision that just compensation must be made when private property is taken for public use. What is private property within the meaning of that Amendment, or what is a taking of private property for public use, is not always easy to determine. ”
