"Nielsen's expected departure is a part of a massive DHS overhaul engineered and directed by top Trump adviser Stephen Miller, according to a senior US official", the report said.
Nielsen was allegedly scheduled to talk to the president about immigration and border issues.
U.S. Secretary of Homeland Security Kirstjen Nielsen speaks beside Honduras' President Juan Orlando Hernandez (not pictured) during a multilateral meeting at the Honduran Ministry of Security in Tegucigalpa, Honduras, March 27, 2019.
"I have confidence that Kevin will do a great job!" he tweeted. She had no intention of resigning, according to one of the sources, but rather was going there with an agenda. The announcement Sunday also follows plans to cut aid to some Central American countries, marking a sudden reversal after Nielsen had days earlier visited Honduras to sign a regional compact agreement with Honduras, El Salvador and Guatemala.
Trump reportedly dismissed current ICE acting director Ronald Vitiello from consideration for the permanent position because Miller wanted someone "tougher".
Recently, the President has spoken several times about the idea of shutting down the southern border entirely.
Mr Trump had threatened to fire Ms Nielsen and she has previously considered resigning, but officials at the time recognised there were no obvious successors in place.
This is a breaking story and may be updated.