The new Trump foreign policy team has brought a dizzying message to European allies on A.I., Ukraine and more. It has already left many angered and chagrined.

President Volodymyr Zelensky of Ukraine and European defense ministers had expressed concern that they might not be present for talks between President Trump and Russia’s leader to end the war.

Taking over the enclave, forcing Palestinians to leave and preventing them from returning would be clear violations of international law, experts say.

The Kremlin freed Marc Fogel, a teacher held for more than three years on drug charges, in a deal negotiated by Steve Witkoff, President Trump’s Middle East envoy.

As the Trump administration works to dismantle the aid agency, right-wing influencers have flooded the internet with falsehoods about its work.

The arrival of the first top Russian diplomat in Damascus since Bashar al-Assad’s fall kicks off negotiations over the fate of Moscow’s bases in Syria.

Early in his first administration, President Trump noted the general’s “brilliance and fortitude.” And then the president got angry.

The mayor, Vitali Klitschko, who has had a tense relationship with President Volodymyr Zelensky, accused him of trying to usurp the powers of elected officials in the capital.

Perhaps none of President Trump’s picks for his new cabinet embody his worldview better than former Representative Tulsi Gabbard.

President Trump jabs at the Russian leader with threats; Vladimir Putin responds with flattery. But there are notable signals in their jousting, including a revived discussion about nuclear arms control.

Russia’s president flattered his American counterpart as “smart” and “pragmatic,” and repeated Mr. Trump’s baseless claim that the 2020 election was stolen.

The high popularity that the Ukrainian president had in the early days of the Russian invasion, with an approval rating of about 90 percent, has dipped badly.

President Vladimir V. Putin of Russia praised President Trump’s second inauguration, but the American leader did not return the compliment.

President-elect Donald J. Trump has made big promises on Ukraine, Iran, China and crises around the globe. But he will have to make difficult choices.

Mr. Rubio expressed views aligned with those of most senators who work on foreign policy, while taking care not to break from Donald J. Trump’s unorthodox ideas.

Russia’s president is said to have blamed birds or a Ukrainian drone for a Dec. 25 crash of an Azerbaijani plane. Azerbaijan says Russian air defenses were at fault.

Senator Marco Rubio, who is nominated for secretary of state, has a long history of personal and policy differences with President-elect Donald Trump.

The White House scrambled to get a message to President Vladimir V. Putin of Russia last year after U.S. intelligence agencies said a Russian military unit was preparing to send explosive packages on cargo planes.

The president-elect had said Russia’s leader wanted to meet him to discuss the war in Ukraine. The Kremlin said it welcomed such dialogue, but a meeting could occur only after Mr. Trump took office.

In the crash’s aftermath, Azerbaijan has unleashed rare and stinging criticism of Russia, with the country’s president saying Moscow’s response has caused “surprise, regret and rightful indignation.”