Anti-spam e-mail suit tossed out Spam & E-Mail5/2/2000; 11:58:10 PM Mar 14, 2000:

'The victory came when King County Superior Court Judge Palmer Robinson dismissed a case in which the state charged Jason Heckel with violating Washington's anti-spam law. Robinson said the law, generally regarded as the nation's toughest, violates the interstate-commerce clause of the U.S. Constitution.' To tell the truth, I can't find an "interstate-commerce clause" of the US Constitution. I'm going to guess it's the full faith and credit clause, but I could be wrong.

Article IV, Section 1: Full faith and credit shall be given in each state to the public acts, records, and judicial proceedings of every other state. And the Congress may by general laws prescribe the manner in which such acts, records, and proceedings shall be proved, and the effect thereof.
Samuel Reynolds thinks it's Article I, section 8.
The Congress shall have power to lay and collect taxes, duties, imposts, and excises, to pay the debts and provide for the common defense and general welfare of the United States; but all duties, imposts, and excises shall be uniform throughout the United States:To borrow money on the credit of the United States;To regulate commerce with foreign nations, and among the several states, and with the Indian tribes; ....
(Emphasis his.)