From the Document: "There is a real crisis at our border. An unprecedented surge in family unit (FMU) migration from Central America is overwhelming our border agencies and our immigration system. This crisis is endangering children. In too many cases, children are being used as pawns by adult migrants and criminal smuggling organizations solely to gain entry into the United States (U.S.). Because 40% of the U.S. Customs and Border Protection (CBP), U.S. Border Patrol's (USBP) resources are currently absorbed in dealing with this crisis, the USBP is not able to effectively manage its other border security missions -- apprehending migrants illegally seeking to evade detection, including criminal aliens and those who pose a public safety or national security threat, uncovering instances of trafficking, fraudulent family relationships and other criminal activity among this population, and monitoring the border for drug smuggling and other contraband. To cover this gap, CBP will need to re-assign an increasing number of CBP officers stationed at ports of entry to assist the USBP in handling the surge in FMU migration."
Department of Homeland Security: https://www.dhs.gov/