Customs And Border Patrol Monitors U.S.-Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A Customs and Border Protection officer with a canine inspects vehicles entering the United States at the San Ysidro Port of Entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A Customs and Border Protection officer with canine inspects vehicles entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A Customs and Border Protection officer with canine walks to inspect vehicles entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) checks the document of a woman entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer waits for pedestrians entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: People wait in line to enter the United States at a pedestrian crossing point at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: People wait in line to enter the United States at a pedestrian crossing point at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) prepares to check the document of a person entering the United States on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) inspects items of a couple entering the United States on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) inspects items of a couple entering the United States on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) waits for a migrant after checking the document of a woman entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A woman walks to enter Mexico on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: People walk to enter Mexico on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer stands guard as pedestrians enter the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A marker notes the border point at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) inspects items of a couple entering the United States on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) inspects the document of a woman entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer (L) prepares to check the document of a person entering the United States on foot at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A U.S. Customs and Border Protection officer stands guard as pedestrians enter the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)

U.S. Customs And Border Patrol Monitors U.S. - Mexico Border Crossing

SAN YSIDRO, CA - APRIL 09: A Customs and Border Protection officer with canine walks to inspect vehicles entering the United States at the San Ysidro port of entry on April 9, 2018 in San Ysidro, California. President Trump has issued a decree for the National Guard to guard the 3,200 kilometer border between the United States and Mexico. (Photo by Mario Tama/Getty Images)