A Ukrainian soldier after loading shells into an American-made Paladin howitzer near Bakhmut last year. Russian operatives are laying the groundwork for what could be a stronger push to support U.S. candidates who oppose aiding Ukraine.

A member of Mexico’s National Guard at the border fence in Playas de Tijuana in February. Some Biden Administration officials question whether the Mexican government is doing enough to drive down a surge in illegal crossings.

Laura Loomer, a right-wing activist, recently interviewed Ayub Ibrahim, a 20-year-old migrant from Somalia, in a migrant camp in Panama. Mr. Ibrahim later said he felt ambushed.

Supporters of Ukraine gathered near the Capitol on Thursday, ahead of President Joe Biden’s State of the Union speech.

New buildings at the Israeli settlement of Eli in the West Bank in December.

Soldiers with the 31st Separate Mechanized Brigade firing a 122-millimeter howitzer D-30 at a Russian target this week in the Donetsk region of eastern Ukraine.

“Argentina has decided to return to the side of the West,” President Javier Milei of Argentina said after meeting with Secretary of State Antony Blinken in Buenos Aires on Friday.

President Biden has been openly critical of President Vladimir V. Putin of Russia, particularly since his invasion of Ukraine in 2022.

President Volodymyr Zelensky of Ukraine at the Munich Security Conference at the Bayerischer Hof Hotel in Munich, Germany, on Saturday.

President Volodymyr Zelensky of Ukraine, speaking at the Munich Security Conference on Saturday, said that if Ukraine lost the war to Russia, it would be “catastrophic” not only for Kyiv, but for other nations as well.

Dario Amodei, Anthropic’s chief executive, testifying in Washington last year. His company said it would prohibit its technology from being applied to political campaigning or lobbying.

President Vladimir V. Putin at a technology forum in Moscow on Wednesday, in a photo released by Russian state media.

President Donald J. Trump speaking in 2018 at a NATO summit in Brussels. He and his advisers say that NATO and other alliances no longer represent U.S. interests.

Ukrainian soldiers from the 72nd Mechanized Brigade in Vuhledar in January.

Alexander Stubb in Helsinki, Finland, on Sunday, after winning the second round of the presidential election.

Former President Donald J. Trump has long threatened to withdraw the United States from NATO.

A protest outside the Henry Hotel in Dearborn, Mich., where Biden administration officials met on Thursday with Arab American leaders.

A photograph released by Russian state news shows President Vladimir V. Putin.

Donald Trump campaigning ahead of the 2016 presidential election in Johnstown, Pa.

Chancellor Olaf Scholz of Germany speaking to the defense minister, Boris Pistorius, second from right, on Wednesday at the German Bundestag in Berlin.

President Biden speaking in Warren, Mich., to members of the United Auto Workers Union, which recently endorsed him. Michigan is vital to Mr. Biden’s campaign for a second term.

Institutions, like the London Underground, exist so that complex processes can become automatic.

India, the world’s fastest-growing economy, will hold the biggest election next year.

Voters casting ballots in November. Russia appears to be paying close attention to the 2024 election, as its war in Ukraine is soon to enter a third year.

Former President Donald J. Trump has made it clear that he primarily sees NATO as a drain on American resources.

Oleksandr Dubinsky after a news conference in Ukraine’s capital, Kyiv, in 2021.

President Biden and Prime Minister Justin Trudeau have seen their poll ratings slump.

President Biden is facing new resistance from an energized faction of his party that views the Palestinian cause in the context of social justice.

Nikki Haley and other members of the Republican Party in trying to tie the Hamas attack to the United States’ southern border through sweeping and largely unsubstantiated claims.

President Biden on his way to Israel. He has expressed firm support for the country after a Hamas attack that killed more than 1,400 Israelis.

Former President Donald J. Trump speaking in Iowa on Saturday. The London lawsuit could offer him more favorable legal terrain than in the United States.