Marc R. Rosenblum
Marc R. Rosenblum is a Visiting Senior Fellow at MPI as well as Senior Fellow at More in Common.
Prior to rejoining MPI, Dr. Rosenblum worked from January 2016 – July 2026 at the Department of Homeland Security (DHS), initially serving as Deputy Assistant Secretary and leading the Office of Immigration Statistics. In 2019, he was designated as the department’s first Evidence Act Statistical Official, overseeing department-wide statistical data governance. In 2023, he was named Executive Director of the newly established Office of Homeland Security Statistics, with responsibility for leading DHS-wide statistical reporting.
Prior to DHS, Dr. Rosenblum was Deputy Director of the U.S. Immigration Policy Program at MPI, where he also earlier had been a Senior Policy Analyst. He also was a Specialist in Immigration Policy at the Congressional Research Service and had previously been a Professor of political science at the University of New Orleans (UNO).
In 2015-16, he served as a Member of the U.S. Immigration and Customs Enforcement (ICE) Federal Advisory Committee on Family Residential Centers, and in 2010-11, he served as a member of the National Research Council’s Committee on Estimating Costs of Immigration Enforcement in the Department of Justice.
Dr. Rosenblum has published more than 60 academic journal articles, book chapters, and policy briefs on immigration, immigration policy, and U.S.-Latin American relations. He is the coeditor (with Daniel Tichenor) of The Oxford Handbook of International Migration (Oxford University Press).
He has received numerous awards, including the Data Foundation Datum Award for Outstanding Commitment to Using Data and Evidence for Public Good (2025), a DHS Secretary Certificate of Merit (2024), an American Population Association Award for Excellence in Public Service (2024), a DHS Secretary Award for Innovation (2022), and a DHS Office of Policy Recognition for Excellence (2016).
Dr. Rosenblum received his BA from Columbia University in 1991 and his PhD in political science from the University of California – San Diego in 2000.
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Explore Content by Marc R. Rosenblum
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Border Metrics: How to Effectively Measure Border Security and Immigration Control
Without reliable border metrics, Congress and the U.S. public cannot assess whether immigration enforcement works or make informed decisions about legislative reform.
Trends in Unaccompanied Child and Family Migration from Central America
After reaching record highs in 2014, Central American child migration fell for a few months before rising again, showing enforcement surges cannot resolve the structural causes of this emigration.
Senate Judiciary Testimony on Immigration Enforcement Priorities and Use of Prosecutorial Discretion
An Analysis of Unauthorized Immigrants in the United States by Country and Region of Birth
While Mexico still accounts for more than half of unauthorized immigrants in the United States, Central American and Asian populations tripled after 2000.
Federal-Local Cooperation on Immigration Enforcement Frayed; Chance for Improvement Exists
A 2015 San Francisco shooting exposed deep rifts in federal-local immigration enforcement, at a time that more than 360 jurisdictions have limited their cooperation with ICE.
Understanding the Potential Impact of Executive Action on Immigration Enforcement
Changed DHS prosecutorial discretion guidelines in 2014 narrowed enforcement to 13 percent of unauthorized immigrants, according to MPI estimates.
Unaccompanied Child Migration to the United States: The Tension between Protection and Prevention
U.S. enforcement responses to the 2014 Central American child migration surge cut flows rapidly but left adjudication failures and the root causes of this migration unresolved.
