The potential rift threatens to undo decades of cooperation between the two neighbors who have worked hard to overcome a long history of mistrust.

Fences and other barriers already blanket about 700 miles of border, much of it in California and Arizona. For many Mexicans, Trump's executive order Wednesday to extend the wall means business as usual at the border.

James Whitlow Delano has spent 30 years documenting the U.S.-Mexico border with his camera and writing about the evolution of this part of southern California. His latest work was published by National Geographic. We are republishing some of them here with texts based on his own descriptions

The proposal comes as a number of New Mexico cities and towns have declared themselves "sanctuaries" for immigrants living in the country illegally.

Panamanian officials are looking into $59 million in alleged bribes paid by Brazilian construction firm Odebrecht.

Activists spoke to the crowd in Washington about the fear of deportations and the need to protect minorities and marginalized people. "Guerreras", "si se puede" and other phrases in Spanish were repeated in unison by demonstrators.