Emmanuel Macron told Argentine newspaper La Nacion that while the alliance between France and the U.S. is “historic,” some of President Donald Trump’s recent decisions “have been done to the detriment of his allies.”

“In these situations, I always clearly affirmed the French and European positions,” the French president said. “It is in these times of crisis when we have to defend our common values, which depend on multilateralism and cooperation.”

Speaking from Buenos Aires, where he arrived Wednesday for the G20 summit, Macron warned against the risk of a “tête-à-tête between China and the United States and a trade war that is destructive for everyone.”