Age gap widens in U.S. regions as immigrants and young move

Driven by immigrants and young people moving to the South and West and older Americans who stay put elsewhere, the age gap between regions in the U.S. has grown to its widest level in decades, sharpening the divides on hot-button issues such as immigration and Medicare.

The new numbers from the Census Bureau highlight the impact of recent waves of young Mexican immigrants and their children, who are helping to slow the aging of the population in many parts of the United States.