The project, which marked its five-year anniversary in October, has played a more significant role since Sept. 11 as aliens become increasingly fearful of job losses and immigration crackdowns.

The decline was attributed, in part, to Homeland Security's focus on potential terrorism threats rather than on a more general immigration crackdown.

The Pentagon gripe that the change would harm battlefield intelligence is a red herring; opponents' attempts to add an immigration crackdown require separate and far more wary consideration.

Mr. Ashcroft used a news conference to announce the list and offer details of the larger immigration crackdown.

The PM's promise yesterday of (yet another) immigration crackdown and an unworkable plan to criminalise forced marriage are classic examples of sideshow politics.

Recent rumors of federal immigration crackdowns appear to have driven thousands of illegal immigrants further underground.

These families are all casualties of a Department of Homeland Security immigration crackdown cheekily titled Operation Return to Sender.

Meanwhile in Britain, the prime minister has announced an immigration crackdown.

In September 2012, Cato published a policy analysis by Nowrasteh that argued that immigration crackdowns in Arizona had adversely affected the state's economy.

A9 The Catholic Church opposes Italy's immigration crackdown.