Lucas Guttentag is the founding national director of the Immigrants' Rights Project of the American Civil Liberties Union (ACLU) and is currently teaching at Yale Law School as the Robina Foundation Distinguished Senior Fellow in Residence and Lecturer in Law.
Guttentag has litigated major class action, constitutional and civil rights cases on behalf of immigrants for more than twenty-five years. He has argued successfully in the United States Supreme Court to enforce habeas corpus rights of immigrants facing expulsion (INS v. St. Cyr) and in federal district and appellate courts throughout the country. He is a Fellow of the American Bar Foundation, named among California's top 100 lawyers and appellate lawyer of the year, designated a Human Rights Hero by the ABA Human Rights journal, honored by many national and community-based organizations, and named one of the country's leading immigration advocates of the last twenty-five years by the National Immigration Forum in Washington, DC. He has testified before Congress, often appears in print and electronic media, and regularly speaks and writes on U.S. immigration law and constitutional issues. Under his direction, the ACLU Immigrants' Rights Project offices in New York and California conduct the country's leading program of national impact litigation to defend and advance the constitutional and civil rights of non-citizens.
Guttentag clerked for federal district judge William Wayne Justice in Texas, and has taught at the University of California Berkeley (Boalt Hall), Stanford and Columbia law schools. He received his AB with honors from UC Berkeley and his JD (cum laude) from Harvard Law School.

Orrin Baird has been an Associate General Counsel of the Service Employees International Union, CTW, since 1990. He is the union’s chief counsel to its Property Services Division which represents many low wage and immigrant workers. He also counsels the union on immigration issues. Before that, he was a partner in the Washington, D.C., labor law firm of Connerton, Ray & Simon from 1980 to 1990. He also worked for the legal department of the Laborers' International Union from 1977 to 1980. Prior to attending law school, he was a VISTA Volunteer and community organizer in south Texas and an organizer for the United Farm Workers in Florida. His practice has been restricted exclusively to representing labor unions, their members and individual workers. He received a J.D. degree from Antioch School of Law in 1977 and a B.A. degree from Wesleyan University in 1969.

Tamar Jacoby is president and CEO of ImmigrationWorks USA, a national federation of employers working to advance better immigration law. A nationally known journalist and author, she is a leading center-right advocate for immigration reform. Her articles have appeared in The New York Times, The Wall Street Journal, The Washington Post, The Weekly Standard and Foreign Affairs, among other publications. She is a regular guest on national television and radio. She is author of Someone Else's House: America's Unfinished Struggle for Integration, and editor of Reinventing the Melting Pot: The New Immigrants and What It Means To Be American, a collection of essays about immigrant integration. From 1989 to 2007, she was a senior fellow at the Manhattan Institute. Before that, she was a senior writer and justice editor for Newsweek. From 1981 to 1987, she was the deputy editor of The New York Times op-ed page.

Mark Krikorian is Executive Director of the Center for Immigration Studies, a non-profit, non-partisan research organization in Washington, D.C., which examines and critiques the impact of immigration on the United States. The Center is animated by a pro-immigrant, low-immigration vision, which seeks fewer immigrants but a warmer welcome for those admitted. Mr. Krikorian frequently testifies before Congress and has published articles in The Washington Post, The New York Times, Commentary, and elsewhere. He is a contributor at National Review Online, and has appeared on 60 Minutes, Nightline, NewsHour with Jim Lehrer, CNN, and NPR, among other television and radio programs. His book, The New Case Against Immigration - Both Legal and Illegal, was published in July of 2008. Mr. Krikorian holds a master's degree from the Fletcher School of Law and Diplomacy and a bachelor's degree from Georgetown University. He spent two years at Yerevan State University in then-Soviet Armenia. Before joining the Center in February 1995, he held a variety of editorial and writing positions.

Thomas Saenz is the President and General Counsel of the Mexican-American Legal Defense and Educational Fund (MALDEF), a national organization dedicated to securing and promoting the civil rights of Latinos in the United States. Mr. Saenz was previously Counsel to the Mayor of the City of Los Angeles. Previously, Saenz practiced civil rights litigation at MALDEF, where he served as Vice President of Litigation. He graduated summa cum laude from Yale University, and he received his law degree from Yale Law School. Saenz then served as a law clerk to the Honorable Harry L. Hupp of the U.S. District Court for the Central District of California, and to the Honorable Stephen Reinhardt of the U.S. Court of Appeals for the Ninth Circuit. Saenz joined MALDEF as a staff attorney in 1993; he became Los Angeles Regional Counsel in 1996, National Senior Counsel in 2000, and Vice President of Litigation in 2001. At MALDEF, Saenz served as lead counsel in numerous civil rights cases, involving such issues as educational equity, employment discrimination, immigrants' rights, day laborer rights, and voting rights. For eight years, Saenz taught "Civil Rights Litigation" as an adjunct lecturer at the U.S.C. Law School. Saenz currently serves on the Los Angeles County Board of Education, and he previously served on the Los Angeles County Commission on Human Relations.