Some DHS officials have threatened to quit and are concerned their emails are being monitored, sources say.

White House pressure to ramp up deportations has sparked rising tension and finger-pointing inside the Department of Homeland Security, with the agency’s secretary, Kristi Noem, and her top adviser blaming subordinates for not hitting arrest quotas and undermining their relationships inside the West Wing, according to two DHS officials with direct knowledge of the matter.

Noem and her close adviser Corey Lewandowski have sought to deflect blame from themselves for any White House frustration with the pace and scope of the deportations, pinning it instead on the leaders of the agencies in charge of immigration enforcement — acting ICE Director Todd Lyons and Customs and Border Protection Commissioner Rodney Scott, the DHS officials said.

Underscoring the turmoil, Scott recently expressed concern to colleagues that Lewandowski is able to monitor his emails, the two officials and another DHS official said, sparking concern among other top staffers that their messages were being reviewed.