A section of the US-Mexico border fence covered with concertina wire is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border at the Tijuana River fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border at the Tijuana River fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border at the Tijuana River fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A crew works replacing the old border fence along a section of the US-Mexico border, as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A crew works replacing the old border fence along a section of the US-Mexico border, as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border fence as seen at Smugglers Canyon from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

TOPSHOT - A crew works replacing the old border fence along a section of the US-Mexico border, as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

TOPSHOT - A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

TOPSHOT - A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

TOPSHOT - An exhibit by local artist Robenz and Central American migrants is on display on the beach next to a section of the US-Mexico border fence as seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)

TOPSHOT - A section of the US-Mexico border fence is seen from Tijuana, in Baja California state, Mexico, on January 8, 2019. - President Donald Trump tells Americans in a primetime speech Tuesday that the US-Mexico border is in "crisis" and Congress must approve construction of a wall to end a government shutdown now in its 18th day. (Photo by Guillermo Arias / AFP)