Donald Trump says Greenland must become American -- by consent if possible, by force if necessary. Europe has responded with a flat refusal, warning that any American land grab could trigger the unravelling of NATO itself.

In the third of his new YouTube program, Switzerland, Tom Switzer puts questions to Jacob Heilbrunn, editor of the National Interest in Washington, and professors Kishore Mahbubani from Singapore and John Mearsheimer from Chicago. Subjects include the future of NATO, the decline of Europe and French President de Gaulle’s prediction that the US would withdraw its military forces from the continent.

Tom Switzer is a journalist and broadcaster who has been a prolific commentator on politics and international affairs. His writing and commentary have appeared in outlets including The Wall Street Journal, The New York Times (international), The Australian, and across ABC and Sky News, where he has been a regular presenter and panellist. For 30 years, since 1995, he has worked at the Washington-based American Enterprise Institute, the Australian Financial Review, The Australian, the London-based Spectator magazine, and the Sydney-based Centre for Independent Studies, which he headed from 2017 to 2025. He is the host of Switzerland, a long-form interview series exploring global politics, modern history, and the ideas shaping the world.

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