The following is advice from Law Schools on Pre-Law Education

“The School of Law does not prescribe any particular pre-law curriculum. The faculty strongly recommends, however, an undergraduate curricular program which provides a wide-ranging liberal education. Such a broad exposure is considered more advisable and useful than a narrow emphasis on vocationally-oriented courses. Particularly recommended are those courses which provide training in written and oral expression and which are intellectually and analytically demanding.” (University of San Francisco School of Law)
“Unlike the pre-medical curriculum that contains specific courses, some obligatory, there is no recommended set of pre-law courses. Enrolling in courses that are designated as part of a pre-law curriculum or major tends to be a less effective means of preparing for law school than enrolling in a diverse college program. While such pre-law courses may introduce you to broad legal principles and may present you with enough information to decide whether to continue with a legal education, they are rarely taught with the same depth and rigor as actual law school courses. In general, law schools prefer that you reserve your legal study for law school and fill your undergraduate curriculum with broad, diverse, and difficult courses.” (The Official Guide to U.S. Law Schools)
“It is essential that the general program be challenging and that the student has become intellectually engaged in it. It is desirable that the applicant has studied a range of subjects, including history, mathematics, a natural science, literature, and economics or one of the social sciences. It is important that the range of studies have comprised certain basic subjects: the essentials of American History, enough mathematics to allow comprehension of statistics, the basic principles of logic and economics, cultural heritage – the European and preferably that of another culture as well.
In addition, since law is above all an art of language, it is well for the student to have had a great deal of experience with writing and with close, intelligent criticism of this written work. A student whose undergraduate education has not enlarged his or her capacity to read, write, speak, and think and to see the relationship both among ideas and between ideas and their human contexts is poorly prepared for law school and even less prepared for professional service in the law.
Virtually any major within a strong general program can be the ground for a good undergraduate education, if taught demandingly and if it leads to substantive mastery of a discipline, preferably a difficult one. There is no need for the major to be related to law; in fact, it is generally wasteful to study law as a preparation for the study of law. If we were to sum up our advice in a phrase, it would be ‘Study something interesting and hard." (University of Michigan Law School)