Regardless of whether individual states wish to allow their citizens to grow, harvest or smoke marijuana or else delimit the circumstances under which they may do so, it is absolutely no business of the Federal government, whose involvement has been extremely costly and ultimately useless.
I'd rather the money wasted on drug enforcement be spent on border security and missiles aimed at terrorists.
I dare say such a strategy would resonate not only with the young who don't pay much in the way of taxes, but with those of us in the gray-haired community who do.