G7 leaders (clockwise from left) German Chancellor Friedrich Merz, United Kingdom Prime Minister Keir Starmer, United States President Donald Trump, French President Emmanuel Macron, Canadian Prime Minister Mark Carney, Italian Prime Minister Giorgia Meloni, Japanese Prime Minister Sanae Takaichi, European Commission President Ursula von der Leyen, and European Council President Antonio Costa attend a working dinner during the G7 summit in Evian-les-Bains, France, on Monday. MANDEL NGAN/AFP

Compared with previous G7 summits, this year's gathering in France is marked by increasingly visible rifts between the United States and Europe, which could undermine the bloc's global influence and weaken its ability to shape international affairs, experts say.

The tensions were laid bare on Monday when US President Donald Trump threatened to impose a 100 percent tariff on French champagne and wine unless France abolished its 3 percent digital services tax on major US technology companies.

French President Emmanuel Macron called for "firm" and "respectful" dialogue, saying the US and the European Union had already reached a tariff agreement and that maintaining stability should now be the priority.