You should look at the official website of the "Global march to Jerusalem". There is everything in it.
Here is the list of the endorsers from USA:
Dr. Amir M. Maasoumi
Ann Wright, United States Army colonel, ret.
Benjamin Monnet, World Assembly Member, USA/Korea
Clayborne Carson, Professor & Director, Martin Luther King Jr. Research and Education Institute, Stanford University
Cindy Sheehan, anti-war activist; mother of US soldier killed in Iraq; author
Cornell West, Professor of African American Studies, Princeton University; Philosopher, writer and Civil Rights Activist
David Hartsough, Director, Peaceworkers, San Francisco
Rev. Dr. Dorsey Blake, Presiding Minister, Church for the Fellowship of All Peoples, San Francisco
Edward Peck, Retired US Ambassador and career US Diplomat
Professor Francis A. Boyle, University of Illinois College of Law
Dr. Hatem Bazian, Senior Lecturer in Near Eastern and Ethnic Studies, University of California, Berkeley
Rev. Dr. Jeremiah Wright, Pastor Emeritus, Trinity Church of Christ, Chicago
Joe Meadors, Veteran and Survivor of the 1967 Israeli Attack on the USS Liberty
Dr. Judith Butler, American philosopher and Professor, University of California, Berkeley
Fr. Louis Vitale, Order of Franciscan Monks; Pace e Bene; nonviolent resistor
Rabbi Lynn Gottlieb, American rabbi in the Jewish Renewal movement
Marcy Winograd, Los Angeles teacher, peace activist and former candidate for the U.S. House of Representatives
Medea Benjamin, Co-founder Code Pink and Global Exchange
Michel Warschawski, anti-Zionist activist and journalist; co-founder, Alternative Information Center
Noam Chomsky, Institute Professor and Professor (Emeritus) in the Department of Linguistics & Philosophy at MIT
Richard Falk, Professor of International Law Emeritus, Princeton University
Roger Leisner, Radio Free Maine
Samuel F. Hart, U.S. Ambassador, ret.
Susan Abulhawa, Palestinian-American author and Founder of Playgrounds for Palestine
Uri Davis, author and civil rights activist