Which president was tougher on drug usersNixon or Reagan? Why? Justify your answer.

Why control drug possession and distribution at all? Why not legalize all drugs? Is drug legislation purely and simply a function of bias against pleasure or the people who use certain psychoactive substances or the fact that certain substances (such as alcohol and tobacco) have been widely used and socially institutionalized for longer periods of time than others (such as marijuana and cocaine)? Or are there objective factors related to harm that have guided lawmakers in passing legislation that attempts to control the use of certain substances more than that of others?