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Grand strategy, Burden sharing, Foreign and defense policy, International security, Israel-Hamas, Israel-Iran, Middle East, and Ukraine-Russia

Christopher McCallion

Fellow

Christopher McCallion is a fellow at Defense Priorities.

McCallion focuses on issues in grand strategy, IR theory, U.S. foreign policy, and technological competition. His work has appeared in POLITICO, Newsweek, The National Interest, and CNN among others. He was formerly an adjunct lecturer in political science at Hunter College, City University of New York, and holds an MSc in Theory and History of International Relations from the London School of Economics and Political Science.

Op-edGrand strategy, Greenland, NATO, Western Hemisphere

Donald Trump is endangering U.S. alliances

By Christopher McCallion

January 30, 2026

During his speech at the World Economic Forum in Davos, President Donald Trump backed off his threats to use force to acquire […]

Op-edVenezuela, Western Hemisphere

Invading Venezuela would betray “America first”

By Christopher McCallion

November 19, 2025

Op-edUkraine‑Russia, Europe and Eurasia, NATO, Russia, Ukraine

President Donald Trump’s Ukraine pivot is an opportunity for Europe to step up

By Christopher McCallion

October 16, 2025

More from Christopher McCallion

Op-edGrand strategy, Greenland, NATO, Western Hemisphere

Donald Trump is endangering U.S. alliances

By Christopher McCallion

January 30, 2026

Op-edVenezuela, Western Hemisphere

Invading Venezuela would betray “America first”

By Christopher McCallion

November 19, 2025

Op-edUkraine‑Russia, Europe and Eurasia, NATO, Russia, Ukraine

President Donald Trump’s Ukraine pivot is an opportunity for Europe to step up

By Christopher McCallion

October 16, 2025

ExplainerDeterrence, Grand strategy

Grand strategy: Deterrence

By Christopher McCallion

October 3, 2025

Op-edIsrael‑Hamas, Israel, Middle East

Trump’s Gaza peace plan won’t end the war

By Christopher McCallion

September 30, 2025

Op-edUkraine‑Russia, Europe and Eurasia, Russia, Ukraine

Trump should walk away from Ukraine before it’s too late

By Christopher McCallion

August 19, 2025

Christopher McCallion Past Events

virtualWestern Hemisphere

What’s next for U.S. foreign policy in 2026? Western Hemisphere Edition

January 14, 2026
virtualVenezuela, Western Hemisphere

Perils of regime change in Venezuela and beyond

October 28, 2025
virtualMiddle East, Basing and force posture, Diplomacy, Houthis, Iran, Iraq, Israel, Israel‑Hamas, Military analysis, Syria

Trump in the Middle East: Impacts, implications, and alternatives

May 16, 2025
virtualUkraine‑Russia, Air power, Diplomacy, Drones, Europe and Eurasia, Land power, Military analysis, Russia, Ukraine

Ukraine’s critical choice: Pursue peace or fight on

April 16, 2025
virtualUkraine‑Russia, Europe and Eurasia, Russia, Ukraine

Trump and Ukraine: Prolonging or ending the war

December 13, 2024
virtualNATO, Alliances, Europe and Eurasia, Russia, Ukraine, Ukraine‑Russia

A ‘bridge’ to NATO or false hope for Ukraine?

July 12, 2024

Christopher McCallion Featured Symposia

symposiumWestern Hemisphere

Americas first: A shift to hemispheric defense

February 10, 2026

symposiumGrand strategy

Realistic recommendations for Trump II

January 13, 2025

symposiumNATO, Alliances

Antique alliance: Rethinking NATO at 75

July 2, 2024