William R. Day,
Hammer v. Dagenhart — Opinion of the Court
“ It not only transcends the authority delegated to Congress over commerce, but also exerts a power as to a purely local matter to which the federal authority does not extend. The far-reaching result of upholding the act cannot be more plainly indicated than by pointing out that, if Congress can thus regulate matters entrusted to local authority by prohibition of the movement of commodities in interstate commerce, all freedom of commerce will be at an end, and the power of the States over local matters may be eliminated, and, thus, our system of government be practically destroyed. ”
