This compact reference book contains the case articles from the prize-winning Oxford Companion to the United States Supreme Court. This new edition of the Guide will contain more than 450 entries on major Supreme Court cases, including 53 new entries on the latest landmark rulings. Among the new entries are United States v. American Library Association (censorship of internet content), United States v. Armstrong (selective prosecution), Atkins v. Virginia (executing the mentally retarded violates the Eighth Amendment''s ban on cruel and unusual punishments), Boy Scouts v. Dale (freedom of association), Bush v. Gore (equal protection and recount), Nixon v. United States (political questions inappropriate for judicial resolution), , Gonzales v. Carhart and Gonzales v. Planned Parenthood Federation of America (abortion), Gonzales v. Raich, (Congress can proscribe all use of marijuana under commerce power), Morse v. Frederick (student''s free speech), and Rumsfeld v. Forum for Academic and Institutional Rights (First Amendment and Solomon Amendment). Four decisions-Hamdi v. Bush, Hamdan v. Rumsfeld, Rasu v. Bush, and Rumsfeld v. Padila-will be considered in a single essay entitled "Enemy Combatant Cases." In addition to these new cases, both front and backmatter materials have been revised, including the Introduction, the Directory of Contributors, Case Index, Topical Index, and Appendix Two has been revised to note changes in the Supreme Court, including the death of Chief Justice Rehnquist and the retirement of Justice O''Connor, and their replacement by Chief Justice Roberts and Justice Alito.