In this May 8, 2019, file photo, Lee Francis Cissna, director of U.S. Citizenship and Immigration Services, sits for a photo in Laguna Niguel, California.
In this May 8, 2019, file photo, Lee Francis Cissna, director of U.S. Citizenship and Immigration Services, sits for a photo in Laguna Niguel, California.

WASHINGTON - President Donald Trump has asked the head of U.S. Citizenship and Immigration Services to resign, leaving yet another vacancy within the Department of Homeland Security. 

Lee Francis Cissna told staff on Friday that his last day would be June 1, according to a copy of the email obtained by The Associated Press.

Cissna leads the agency responsible for legal immigration, including benefits and visas. He had been on the chopping block last month amid a White House-orchestrated bloodbath that led to the resignation of Secretary Kirstjen Nielsen, but his job was saved after high-ranking Republicans spoke out about his record. 

There are more than a dozen vacancies of top posts at the sprawling 240,000-member department that are being temporarily filled, including secretary and the inspector general. Cissna's position, like others, requires Senate confirmation.