Relied on by students, professors, and practitioners, Erwin Chemerinsky’s popular treatise clearly states the law and identifies the underlying policy issues in each area of constitutional law. Thorough coverage of the topic makes it appropriate for both beginning and advanced courses. New to the Sixth Edition: New discussion of the Preamble to the Constitution in Ch. 1 Discussion of many new cases throughout the book. Major new decisions include: Masterpiece Cakeshop v. Colorado Civil Rights Commission; Gill v. Whitford; Zivotofsky v. Kerry; Lucia v. SEC; South Dakota v. Wayfair; Fisher v. University of Texas, Austin; Obergefell v. Hodges; Whole Women’s Health v. Hellerstedt; Matal v. Tam; Williams-Yulee v. Florida State Bar; National Institute of Family and Life Advocates v. Becerra; Janus v. American Federation; Town of Greece v. Galloway; and Trinity Lutheran Church of Columbia v. Comer New materials on presidential power, immigration, and travel bans under the Trump administration, including IRAP v. Trump and Hawaii v. Trump Professors and students will benefit from: Renowned authorship Examination of black-letter law and all the myriad issues of constitutional interpretation with unrivaled thoroughness and lucidity Excellent historical overview of the creation and ratification of the Constitution, examining the existential question of why we have a constitution