Alberto Rodriguez is the founder of You Don’t Speak For Me!, a grass-roots collective of Latino activists who oppose illegal immigration. He has spoken against illegal immigrants and those who support them. He lives in Scottsdale, Ariz.

John Wozniak is a professor and chairman of the sociology department at Western Illinois University in Macomb. He is president of the Justice Studies Association, where the 2009 annual conference focused on “Immigration, Sanctuary, Worlds Without Borders.”

Rosanna Pulido is the founder and leader of the Chicago and Illinois chapters of the Minuteman Project. She has spoken against Chicago churches that have sheltered illegal immigrants.

Dave Gorak is executive director of the Midwest Coalition to Reduce Immigration, which is based in LaValle, Wis. He is critical of the New Sanctuary Movement and its supporters.

Rodney Hunt is president of the Mississippi Federation for Immigration Reform and Enforcement, a Jackson-based group that seeks immigration reform.

David Martin is a nonresident fellow at the Migration Policy Institute and a professor of international law at the University of Virginia in Charlotte.

The Rev. Juan Carlos Ruiz is the founding director of Asociación Tepeyac, an immigrant community services agency in the Bronx, N.Y. He is the northeast coordinator of the New Sanctuary Movement and is involved with local sanctuary networks.

The Rev. Kim Crawford Harvie is pastor of Arlington Street Church, a Unitarian Universalist church in Boston. The congregation joined the New Sanctuary Movement.

Joachim von Braun is director general of the International Food Policy Research Institute, whose mission is to seek sustainable solutions to end hunger and poverty. Based in Washington, D.C., it is one of 15 centers supported by the Consultative Group on International Agricultural Research, an alliance of 64 governments, private foundations, and international and regional organizations.