President Donald Trump has sent a letter to congressional members to discuss illegal immigration and the importance of border security.

Trump presented statistical data about security and humanitarian crises at the Southern Border in the letter, according to a White House news release posted Friday.

He noted that the Customs and Border Protection and its agents arrested 17K individuals with existing criminal records in fiscal 2018 and that immigration courts now have a backlog of 800K cases.

“Effective border security must dramatically reduce the entry of illegal immigrants, criminals, and drugs; it must keep out terrorists, public safety threats, and those otherwise inadmissible under U.S. law; and it must ensure that those who do enter without legal permission can be promptly and safely returned home,” Trump noted.

He called on Congress to support the proposed border wall, eliminate the Flores Settlement Agreement and amend the Trafficking Victims Protection Reauthorization Act to facilitate the return of smuggled minors into their countries.