Clinton officials point out that the president has mentioned drugs in recent radio broadcasts and public-service announcements. They tout the $14.6 billion for drug programs in Clinton’s ‘96 budget, a $1.3 billion increase from last year. And they blast the Republicans for their proposed cuts in the Safe and Drug-Free Schools program. But a strong anti-drug pitch hasn’t been a major part of the recent White House message – even though statistics show that after 20 years of decline, marijuana use is now rising again among teenagers. Administration officials privately concede that Mrs. Reagan’s criticism hit home. ““She scored a lot of points,’’ said a senior Clinton aide. ““We’ve got a good strategy. Why haven’t we been talking about it more effectively?’'