^
They won't. The way Obama worded it in his book, he made it look as though he was flirting with the dangerous path a typical young black man is likely to take. Attacking his drug use would be like attacking him because he's black, is probably what Hillary's team of consultants are telling her.. Even if he was white, attacking him because of his drug problem is like an open invitation to play dirty in public debates, and that would be "politics as usual." "Voters want to hear about the issues" is basically a tagline for both campaigns. And besides, Hillary doesn't want to play too dirty. It's not too hard to paint a dirty picture of her character as a whole, whereas Barack Obama did drugs... ammunition depleted.