Poland's Prime Minister Donald Tusk, left, and Sweden's Prime Minister Ulf Kristersson sign an agreement during Thursday's summit at Harpsund in Flen, Sweden, Thursday, Nov. 28, 2024. (Henrik Montgomery/TT News Agency via AP)

European Commission President Ursula von der Leyen, left, is congratulated by European Parliament President Roberta Metsola, after a vote by the European Parliament to approve the new EU College of Commissioners at the European Parliament in Strasbourg, France, Wednesday, Nov. 27, 2024. (AP Photo/Jean-Francois Badias)

Poland's Prime Minister Donald Tusk speaks to reporters in Dabrowka, Poland, during a visit to Poland's border with Russia on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)