CSIS | Center for Strategic and International Studies

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Is the United States Winning the Fusion Race? Featuring Bob Mumgaard

Analysis by Navin Girishankar

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War in Iran

Photo: Amirhossein KHORGOOEI/ISNA/AFP/Getty Images

War Costs Make Up a Third of the $87.6 Billion Supplemental Request

About one-third of the Trump administration’s $87.6 billion supplemental request is driven by costs related to the Iran war. The remainder funds other administration priorities, both defense and domestic. Some war costs will have to be covered by other budget mechanisms.

by Mark F. Cancian and Chris H. Park

Latest Analysis: War with Iran

Photo: Amir Hossein Khorgooei/Anadolu/Getty Images

Is the Iran War Entering a Dangerous New Phase?

by Mona Yacoubian

Photo: Henry NICHOLLS / AFP via Getty Images

The Air Campaign Returns: From Epic Fury to Midnight Hammer

by Aerospace Security Project and Defense and Security

War in Ukraine

The Geography of Coercion: Russian Missile and Drone Campaigns in Ukraine

by Marcus Welsch, Yasir Atalan, Benjamin Jensen, and Erik Tiersten-Nyman

A Tale of Two Strategic Attacks: The Race to End the War in Ukraine

by Benjamin Jensen and Yasir Atalan

Rebuilding to Reconquer: Can Russia’s Defense Firms Deliver?

by Maria Snegovaya, Tina Dolbaia, Nicholas Fenton, and Max Bergmann

Russian Blood and Treasure: The Ballooning Costs of Putin’s War

by Seth G. Jones and Riley McCabe

Photo: Laura Proctor/Bloomberg/Getty Images

Elbows Up: The Price of Economic Coercion Against Canada

The United States has announced 50 percent tariffs on $20 billion worth of Canadian imports. If enacted, the measures would have implications for economic welfare and trade diversification in both countries.

Commentary by Philip Luck — July 21, 2026

Understanding President Trump’s New Tariffs on Canadian Imports

On July 20, President Trump formally invoked Section 338 of the Tariff Act of 1930 for the first time to impose 50 percent duties against a significant range of Canadian products. Our experts explain the statute and its global implications.

Critical Questions by Christopher Gundermann, Hugh Grant-Chapman, and Diego Marroquín Bitar — July 21, 2026