Others see immigration as an engine of economic growth.

They see immigration as the very foundation of the United States.

The 1990s and early 21st century saw renewed immigration on a large scale.

The Republic of Ireland in particular has seen large-scale immigration.

The 1970s, 1980s and 1990s saw increasing immigration from Africa, often as a consequence of civil wars.

China's leaders see illegal immigration as a simple and inexpensive solution to their population problem.

The see illegal immigration as a threat to the United States while also demeaning rule of law.

In other cities, too, that have seen heavy Asian immigration, the health care system is adapting.

Mexico throughout history has seen immigration from different parts of Asia.

The 1880s saw vigorous immigration into the area, especially people who came from Ireland.