http://www.cis.org/articles/2005/back1005.html
James R. Edwards, Jr.,
"This paper describes the contribution immigration law has made and can make again in barring and removing ideological enemies from our shores. It is an unavoidable consequence of mass immigration; the higher the level of immigration, the more likely it is that individuals espousing hatred and violence toward America will gain entry. But whatever the level of immigration, excluding or removing noncitizens from the United States based on their promotion of radical beliefs (''ideological exclusion'') can help to protect the country."
PDF - http://www.cis.org/articles/2005/back1005.pdf
