Chris Magnus is resisting leaving the post after being told by Homeland Security Secretary Alejandro Mayorkas to resign or be fired, according to the source. It comes after a record year of migrants seeking to enter the US along the border with Mexico. Chris Magnus appears before a Senate Finance Committee hearing on his nomination to be the next Commissioner of U.S. Customs and Border Protection in the Dirksen Senate Office Building on Capitol Hill in Washington, DC on October 19, 2021. ( Rod Lamkey /Pool via REUTERS /File Image) Magnus has only been on the job for about a year, and sources say he has clashed with Department of Homeland Security (DHS) officials over border enforcement policy. Some of Magnus’ duties have been taken over by his deputies. DHS officials did not immediately respond to a request for comment. New DHS data show that for the fiscal year that ended in September, nearly 2.4 million immigrants were detained at the border, a 37 percent increase over the previous year. This is a developing story. Check back for updates.