The Department of Homeland Security significantly stepped up immigration enforcement efforts in 2007.


But illegal immigration opponents say it must do a better job of targeting the lure of illegal immigration: The availability of work.

Immigration and Customs Enforcement made nearly four times as many workplace arrests as it did in 2006. Of those 4,900 arrests, 864 people were charged with a crime, more than 500 of which involved document fraud and identity theft in an attempt to appear to be legal residents.

The number of employers or managers arrested for hiring illegal immigrants was fewer than 100, however.

"When you have more than 500,000 illegals entering this country every year, you are not going to cut off the incentive until you start drying up employment. Employment is the No. 1 reason illegal immigrants come here,â€