A migrant shelter south of the Arizona-Mexico border has served as a vital lifeline for thousands of migrants seeking a better future in the United States ...

President Donald Trump is already following through on campaign promises he made to crack down on the flow of migrants ...

Residents along Arizona's 372-mile border with Mexico make up a complicated tapestry of views, concerns and hopes on the eve of Trump's inauguration.

Nogales, Mexico — across from Nogales, Arizona — announced that it would build shelters on soccer fields and in a gymnasium.

The U..S Attorney's Office revealed on Monday that the Tucson Sector Border Patrol and Yuma Border Patrol made 3,141 arrests ...

Trump is declaring a national border emergency and taking other steps to curb immigration. Here's what that means.

Border communities in Arizona are bracing ... and fears it could fall on small cities like his. "What will happen if Mexico doesn’t receive all migrants and nationalities?" ...

Arizona Republic reporters traveled along that border to far-flung communities ... a fraction of the number living in the much larger town of Naco, Mexico, just across the border.

Low temperatures dropped to 19 overnight in the border region Monday morning. The woman is still unidentified, but she was carrying documents indicating she was from Mexico, said Gene Hernandez ...