• On the fourth leg of a grueling overseas trip, President Trump met with Donald Tusk, the president of the European Council, and Jean-Claude Juncker, the president of the European Commission.

• Mr. Tusk said that there were differences of opinion over Russia, but that when it came to Ukraine, “it seems that we were on the same line.”

• Mr. Trump will also meet with other European leaders, and analysts said anxiety was high but expectations low. It is Mr. Trump’s first visit to the Belgian capital — headquarters of the European Union and the North Atlantic Treaty Organization — since he called the city a “hellhole.”

• After Mr. Trump urged the alliance to do more against terrorism, NATO announced that it would formally join the fight against the Islamic State.

• European leaders’ main hope is that Mr. Trump will explicitly endorse Article 5 of the Atlantic alliance’s founding treaty, which states the principle that an attack on any member is an attack on all.

NATO leaders are holding their breath: Will Mr. Trump endorse Article 5?

MORE: https://www.nytimes.com/2017/05/25/world/europe/trump-brussels-nato.html?_r=0