So in his Raich dissent, O'Conner is reminding us that in 1990 Lopez, Scalia made the Necessary and Proper argument and lost. O'Connor is saying that Scalia should lose again for a similar reason.
O'Connor says, as with Lopez, "There is simply no evidence that homegrown medicinal marijuana users constitute, in the aggregate, a sizable enough class to have a discernable, let alone substantial, impact on the national illicit drug marketor otherwise to threaten the CSA regime."
Followed by (this is the best part) "... in part because common sense suggests that medical marijuana users may be limited in number and that Californias Compassionate Use Act and similar state legislation may well isolate activities relating to medicinal marijuana from the illicit market, the effect of those activities on interstate drug traffic is not self-evidently substantial."
BWAHAHAHAHAHA! Yeah. California "may well" isolate my a$$. What was that other thread about? A "medical marijuana" store opening up at Fisherman's Wharf in San Francisco?
Scalia was right. Congress cannot rely on the states to do the enforcement of local regulations where interstate commerce is at stake.
(Oh, nowhere in Raich does it say that the Lopez law with the new language is perfectly Constitutional in light of Raich. O'Connor is simply whining that if we applied Scalia's logic to Lopez, Lopez would have been decided differently. O'connor is not making a case FOR Lopez and much as he is making a case AGAINST Raich.)