Polish Prime Minister Donald Tusk has announced an upcoming series of meetings with French President Emmanuel Macron, UK Prime Minister Keir Starmer, NATO Secretary-General Mark Rutte, and leaders of Nordic and Baltic countries to discuss transatlantic cooperation and the ongoing war in Ukraine.

Tusk emphasized that the future of aid to Ukraine is a crucial issue facing the European Union, particularly following Donald Trump’s victory in the U.S. presidential election, Reuters reports.

Trump has criticized the level of U.S. support for Ukraine in the conflict and promised, before the election, to end the war before taking office, though he has not provided details on how he intends to achieve this.

“There is no doubt that this new political framework poses a serious challenge for everyone, especially in the context of a potential end to the conflict between Russia and Ukraine, possibly through an agreement between the Russian President and the new U.S. President,” Tusk stated.

He noted that Macron and Rutte are expected to visit Warsaw, and he will meet with Starmer either in Warsaw or London. Meetings with Nordic and Baltic leaders are planned for Stockholm, reports Tanjug.