Interstate commerce:
Gonzales v. Raich, 545 U.S. 1 (2005)
WIckard v. Filburn, 317 U.S. 111 (1942)

Interstate commerce cases curbing congressional authority:                                            
U.S. v. Morrison, 529 U.S. 598 (2000)                       
U.S. v. Lopez, 514 U.S. 549 (1995)

Power to tax and regulate:
Steward Machine Co. v. Davis, 301 U.S. 548 (1937)

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