Seamus P. Daniels

Fellow, Defense Budget Analysis
Seamus P. Daniels

Seamus P. Daniels is a fellow for Defense Budget Analysis in the International Security Program at the Center for Strategic and International Studies (CSIS), where he researches issues related to U.S. and global defense funding, force structure, and military readiness. He has authored publications on trends in the overall U.S. defense budget, the legislative process surrounding defense appropriations, defense strategy and force structure, and NATO burden sharing. Prior to joining CSIS, Mr. Daniels worked for Government Executive Media Group. He holds an MA in international relations from Johns Hopkins University School of Advanced International Studies and an AB from Princeton University’s School of Public and International Affairs with minors in Near Eastern studies and Arabic language and culture.

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Audio Briefs

What a Government Shutdown Would Mean for Defense Funding in FY 2025

An audio version of “What a Government Shutdown Would Mean for Defense Funding in FY 2025,” a new Critical Questions by CSIS's Seamus Daniels. This audio was generated with text-to-speech by Eleven Labs.

Podcast Episode by Seamus P. Daniels — March 13, 2025

Audio Briefs

Dept. of Defense Faces Shutdown Amid Continuing Resolution Uncertainty

On March 14, the current continuing resolution (CR) funding the Department of Defense (DOD) and the rest of the federal government for FY 2025 will expire, and a government shutdown will take effect on March 15 at midnight if Congress does not act. On Tuesday, March 11, the House of Representatives passed H.R. 1968 to extend the CR through the end of FY 2025 on September 30, but Senate Democrats oppose the measure in favor of a short-term CR. 

Chart by Seamus P. Daniels — March 13, 2025

What a Government Shutdown Would Mean for Defense Funding in FY 2025

The continuing resolution that the federal government and Department of Defense currently operate under for FY 2025 will expire on Friday, March 14. Unless Congress passes another CR or full-year appropriations, DOD will face a government shutdown.

Critical Questions by Seamus P. Daniels — March 13, 2025

Deterring Russia: U.S. Military Posture in Europe

Russia’s war in Ukraine and subversive activities in Europe pose a long-term security challenge. While the United States must press its allies to increase defense spending, it should also maintain a resilient—and sustainable—presence in Europe to deter Russian aggression.

Brief by Seth G. Jones and Seamus P. Daniels — January 27, 2025

Forward Defense: Strengthening U.S. Force Posture in Europe

The United States needs a robust force posture, including U.S. Army presence, in Europe on NATO’s eastern flank to deter future Russian aggression. A significant downsizing of U.S. forces in Europe would weaken deterrence and embolden a revanchist Russia.

Report by Seth G. Jones, Seamus P. Daniels, Catrina Doxsee, Daniel Fata, and Kathleen McInnis — March 11, 2024

Air Force Priorities in an Era of Strategic Competition

Please join the CSIS Aerospace Security Project and Defense Budget Analysis program on January 24 at 11:00am for a conversation on the Air Force’s budgetary priorities with the Under Secretary of the Air Force and the Deputy Chief of Staff for Plans and Programs.

Event — January 24, 2024