Edited sentence: Brookings Institute: Immigration Policy webpage.Carrying Capacity Network.Cato Institute's Center for Trade Policy Studies - Immigration webpage.Center for Immigration Studies.Diversity Alliance for a Sustainable America.Fair Immigration Reform Movement.Federation for American Immigration Reform.Immigrant Workers Freedom Ride Coalition.Lonewacko: Immigration category.Migration Policy Institute.National Immigration Forum.National Immigration Law Center.National Network for Immigrant and Refugee Rights.New American Opportunity Campaign.Project USA.Rights Working Group.The Legalization Site.Urban Institute: Immigration Studies webpage