The conservative commentator argues against unchecked immigration.

The conservative commentator argues that unchecked immigration means that the American Southwest is being reconquered by Mexico, and offers a border-security plan.

There is little doubt, however, that fears of unchecked immigration have helped boost the Freedom Party's standing.

Around the Pacific Rim, historically European societies have long had a visceral fear of unchecked immigration from China, the region's population behemoth.

The state recorded the country's highest population growth rate, more than 34 percent, from 1961 to 1971, and officials said that was largely because of unchecked immigration from East Pakistan.

However, after 1975 there was increasing problems with shortage of consumer and food products, social problems, unchecked immigration and damage to the environment.

Or an environment-based justification for unchecked immigration; "phew it's hot here, and over there its cooler with benefits to boot"...

Chittum is notably fretful about the Southwest; he thinks that unchecked immigration will make it a de facto part of Mexico by 2020.

In addition, Harry Laughlin, the superintendent of the Eugenics Record Office, invoked the Tribe of Ishmael to caution against unchecked immigration.

Many of those who led the charge for Proposition 187 argued that the greatest danger of unchecked immigration is not to the economy, but to American culture itself.