War with Iran
War in Ukraine
by Marcus Welsch, Yasir Atalan, Benjamin Jensen, and Erik Tiersten-Nyman
by Seth G. Jones and Riley McCabe
Photo: CSIS
Earn an Executive Certificate
Photo: Laura Proctor/Bloomberg/Getty Images
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
Photo: Jim WATSON/AFP/Getty Images
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
Featured Analysis
by Jane Nakano
by Ayantola Alayande, Catherine Nzuki, and Aaron Stanley
by Carol Kuntz and Lauryn Williams
Featured Videos
Departments
Defense and Security
Economic Security and Technology
Geopolitics and Foreign Policy
Global Development
Upcoming Events
Photo: MangKangMangMee/Adobe Stock
Launching the International Call to Action for 6G Leadership and Security
The Impossible State Live Podcast: Poisoning the Well? U.S.-Korea Trade Tension
Photo: ARIS MARTINEZ/AFP via Getty Images
Future of U.S. Land Power: Perspectives from Under Secretary of the U.S. Army Hon. Mike Obadal
Photo: ytemha34/Adobe Stock
Navigating the Strait of Hormuz Energy Crisis: Trends and Variety Across Global Policy Responses
Executive Education Courses
Inside Washington: A Decoding D.C. Crash Course
Global Foresight: Geopolitical Risk and Scenario Planning
AILA International Fellowship
The Latest from CSIS
Defense and Security
Why the United States and Iran Keep Fighting While They Negotiate
Commentary by Emily Harding — July 24, 2026
Energy and Sustainability
Trade Tools for Accelerating the Electric Vehicle Transition: Best Practices from Existing Frameworks
Report by Akanksha Golchha and Aryan D’Rozario — July 17, 2026
International Development
AI Strategies and the Informal Economy: Africa’s Job Creation Test
Commentary by Ayantola Alayande, Catherine Nzuki, and Aaron Stanley — July 22, 2026
Geopolitics and International Security
What the Iran War Is Costing Joint Gulf-U.S. Ambitions for AI
Commentary by Joseph A. Farsakh — July 15, 2026
Ukraine War
A Tale of Two Strategic Attacks: The Race to End the War in Ukraine
Commentary by Benjamin Jensen and Yasir Atalan — July 15, 2026
Trade and International Business
Section 232 Explained
Commentary by William Alan Reinsch — July 22, 2026
Space and Aerospace
Assessing the State of the U.S. Space Industrial Base
Transcript — June 5, 2026
Critical Minerals
Economic Warfare and Military Power
Brief by Benjamin Jensen and Jacob Clayton — May 26, 2026