Polish Prime Minister Donald Tusk said on Monday he felt both anxiety and optimism ahead of an upcoming summit between the United States and Russia concerning the war in Ukraine. The meeting, scheduled for August 15 in Alaska, has prompted concern in Kyiv that the two leaders might seek to determine terms for ending the more than three-year conflict without fully involving Ukraine.

According to Tusk, Washington had given assurances that it would coordinate with its European allies prior to the summit. “The American side has promised that it will consult with European partners on its position before the meeting in Alaska,” Donald Tusk told a news conference.

“I will wait… for the effects of the meeting between Presidents Trump and Putin – I have many fears and a lot of hope.”

Tusk also noted that Trump’s recent statements about the conflict could be interpreted as a sign that the U.S. president was becoming more receptive to the viewpoints of Ukraine and Europe. However, he admitted uncertainty over whether this position would hold.

French, Italian, German, Polish, British, Finnish, and European Commission leaders issued a joint statement on Saturday supporting Trump’s initiative to help bring an end to the war, while underscoring the importance of maintaining pressure on Russia and offering strong security assurances to Kyiv.

Tusk stressed that the unified stance among European leaders highlighted the need for Ukraine’s involvement in any peace process. “For Poland and our partners, it is clear that state borders cannot be changed by force,” he said. “Russia’s war with Ukraine must not bring benefits to the aggressor.”