The senior official responsible for overseeing data across the Department of Homeland Security has resigned, publicly criticizing the Trump administration's immigration policies and what he described as a "war on immigrants," becoming one of the highest-ranking career officials to openly denounce the department's direction during Trump's second term.
Marc Rosenblum, who served as executive director of the Office of Homeland Security Statistics and deputy assistant secretary at DHS, announced his departure in a LinkedIn post over the weekend after serving under both the first Trump and Biden administrations. "I'm thrilled to end my relationship with the current administration," he wrote. "Between the war on immigrants, the war on feds, and the war on facts... I just need a change."
Rosenblum oversaw the office responsible for compiling department-wide data on immigration enforcement, border security, cybersecurity and other DHS operations. According to WIRED, the agency's public dashboards tracking ICE detentions, Border Patrol encounters and deportations have not been updated since February 2025, limiting access to information that analysts say is essential for evaluating the administration's immigration policies.
A DHS spokesperson told WIRED that "people are always welcome to their opinion—that doesn't make it right or factual," declining to comment further on Rosenblum's resignation.
His departure comes as immigration enforcement continues to expand. Newly released ICE data analyzed by The Guardian, show federal agents arrested 43,138 immigrants in June, the highest monthly total since Trump's return to office.
More than 65,700 people were in ICE detention as of July 11, while the administration has deported more than 590,000 people since January 2025. The report also noted that ICE delayed publishing arrest and detention statistics for months before releasing updated figures this week.
Recent reporting has also highlighted concerns about oversight within the agencies carrying out the crackdown. Mother Jones reported that the Ohio Immigrant Alliance identified 59 current and former ICE and Customs and Border Protection employees who were accused, charged or convicted of violent or sexual crimes between 2007 and 2026, arguing the cases point to broader concerns about vetting and accountability rather than isolated misconduct.
Before joining the first Trump administration, Rosenblum had warned Congress that large-scale deportation efforts could carry significant economic and humanitarian costs. In 2015 testimony, he argued that "a robust enforcement system inevitably inflicts damage on established families and communities" and warned that widespread deportations could reduce the U.S. workforce and economic output.
