Donald Trump is set to attend the NATO summit in Ankara, Turkey, with planned meetings including Turkish President Tayyip Erdogan on Tuesday, Ukrainian President Volodymyr Zelenskiy on Wednesday, and Syrian President Ahmed al-Sharaa. A senior U.S. official stated that discussions with Zelenskiy will focus on ending the war in Ukraine and that the battlefield has shown no major advances by either side in recent months. Trump is also expected to press NATO allies on increasing defense spending.