Hawks in the opposition are already baying for the expulsion of thousands of illegal migrant workers from Armenia and for a ban on flights between Armenia and Turkey.

ECONOMIST: Turkey and the Armenians

His wife, Sona Khatum, comes from an impoverished family in one of India's poorest states, though village rumour mutters that she may be an illegal migrant from Bangladesh.

ECONOMIST: Struggling to cope with a dearth of brides

While some have criticized the House for turning a witness chair over to Stephen Colbert, in reality, the comedy show host and satirist used his testimony to explain well the issue of illegal immigration and migrant farm workers.

FORBES: Colbert Hits the Mark in Hill Testimony

The Mexican-American Legal Defence and Education Fund, alongside the Democrats but not the Republicans, has lobbied for having a statistically estimated adjustment in the census, to take account of the many poor, migrant, homeless and illegal people whom the census may miss.

ECONOMIST: Special-interest groups

The plight of migrant workers in Thailand is worsened by the unregistered and hence illegal status of at least half of them.

ECONOMIST: Migrant workers battered by the slump

"Instead of clamping down on illegal immigration, what this policy seems to be doing is focusing on a minority of skilled migrant for whom the employers can demonstrate a business case, " he said.

BBC: Immigration debate