Final answer:
Immigrants that cross the American southern border refers to individuals who enter the United States through the southern border with Mexico without proper documentation or authorization. This topic is prominent in U.S. politics and society.
Step-by-step explanation:
Immigrants that cross the American southern border are individuals who enter the United States through the southern border with Mexico. This is often referred to as illegal immigration because it involves crossing the border without proper documentation or authorization. Immigration policies and the issue of border security have been significant topics in U.S. politics and society.
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