The border wall that already exists

The pedestrian border in Nogales, Arizona.

Nov. 7, 2016

A woman In Tijuana talks to her relatives across a fence.

Nov. 13, 2016

A gap in the U.S.-Mexico border fence outside Jacumba, California.

Nov. 7, 2016

A road abruptly ends next to a sign for a cattle ranch near Douglas, Arizona.

Oct. 10, 2016

A newly-built section of the border fence in Ciudad Juarez, Mexico.

Jan. 25, 2017 ( REUTERS/Jose Luis Gonzalez)

The backyard of a home in Brownsville, Texas, faces the border fence.

Aug. 5, 2014

The border near Calexico, California.

Feb. 9, 2017

The border fence in Mexicali, Mexico, painted sky blue.

April 9, 2016

The border in Calexico, California.

Oct. 8, 2016

A San Diego beach.

Nov. 13, 2016

A fence separates the border towns Nogales, Arizona (left), and Nogales, Mexico (right).

Oct. 9, 2016