The president declared a national emergency in February to access federal money to build a wall similar to this razor-wire-covered border wall separating Nogalas, Mexico (left), and Nogales, Ariz. Congress did not approve the full amount he asked for last year to follow through on a key campaign pledge.

The president declared a national emergency in February to access federal money to build a wall similar to this razor-wire-covered border wall separating Nogalas, Mexico (left), and Nogales, Ariz. Congress did not approve the full amount he asked for last year to follow through on a key campaign pledge.