A question for my candidate

Julian Sanchez notes how odd it is that it is seen as gauche to mention Barack Obama's youthful indiscretions with drugs.

Now, this is all right with me: I think the laws prohibiting cocaine and marijuana are foolish and wrong, that there's nothing especially shameful about having used them, and that so long as we're talking about use that ended long ago, it's a private matter that shouldn't be used as campaign fodder. What I find surprising—or at any rate, inconsistent—is that so many folks in mainstream politics and media seem to be on board with that third point given how few are prepared to publicly endorse the first two. Because our government does, in fact, send people to prison for using cocaine and marijuana. And it seems a little odd to get the vapors at the prospect of anyone criticizing a candidate for behavior that they concede, at least tacitly, it would have been perfectly legitimate to lock him away for.

As an avid drug legalizer myself, I should like to see someone ask this question:

Senator, you used cocaine and marijuana. Would it have been just and right for you to have been sentenced to multi-year prison terms under today's drug laws?

Has anyone actually said this?