...the authority to enact laws necessary and proper for the regulation of interstate commerce is not limited to laws governing intrastate activities that substantially affect interstate commerce. Where necessary to make a regulation of interstate commerce effective, Congress may regulate even those intrastate activities that do not themselves substantially affect interstate commerce.
Scalia concurring in Raich
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Both Roberts and Scalia are complicit in killing the Tenth Amendment.
"The Federal Government may enact a tax on an activity that it cannot authorize, forbid, or otherwise control."
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"Where necessary to make a regulation of interstate commerce effective, Congress may regulate even those intrastate activities that do not themselves substantially affect interstate commerce."