Immigration issue resources

Immigration Enforcement within the United States
Published for Congress by CRS on April 6, 2006, this report provides a comprehensive analysis of immigration enforcement within the United States.

The Size and Characteristics of the Unauthorized Migrant Population in the U.S
Published in March 2006 by Pew Hispanic Center provides "estimates based on the March 2005 Current Population Survey."

Office of Immigration Statistics
Department of Homeland Security's OIS is responsible for developing, analyzing, and disseminating statistical information needed to assess the effects of immigration in the United States.

Also:
The New Neighbors by the Urban Institute
Public Agenda issue guide on immigration