The Department of Homeland Security’s top data analyst has resigned, citing the Trump administration's “war on immigrants.” Marc Rosenblum, who headed statistical offices within DHS and even warned about mass deportations during his Senate testimony, departs amid controversies over funding, detention centers, and a lack of transparency.

“Between the war on immigrants, the war on feds, and the war on facts,” he wrote in a LinkedIn post. His office once peaked at 45 people but has since shrunk, as data from DHS has become spotty and unreliable, according to critics like David Bier of the Cato Institute.

“There’s no accountability, no way to assess, no public understanding that is not curated by a press release,” he added. Rosenblum praised his co-workers but noted the “challenging and often hostile work environment.” The resignation follows similar departures from acting ICE director Todd Lyons and top FEMA officials.

In his testimony in 2015, Rosenblum warned that mass deportation efforts could be counterproductive and harmful to the economy. He emphasized that significant enforcement disrupts labor markets and can spread fear through immigrant communities. His departure signals a growing discontent with the administration's approach towards immigration policies and data integrity.