As hundreds of demonstrators made their way through Lower Manhattan on Tuesday to protest the detention of a prominent pro-Palestinian activist at Columbia University, the White House defended the arrest and rebuked the school for what it called lack of cooperation. The activist, Mahmoud Khalil, was a leader of student protests on Columbia’s campus and…

The U.S. power grid added more capacity from solar energy in 2024 than from any other source in a single year in more than two decades, according to a new industry report released on Tuesday. The data was released a day after the new U.S. energy secretary, Chris Wright, strongly criticized solar and wind energy…

The arrest of a former Columbia University graduate student who gained prominence amid that campus’s pro-Palestinian demonstrations has divided the American Jewish community, which finds itself trying to reconcile a longstanding focus on Jewish safety and support for Israel with a historical commitment to civil liberties. Immigration authorities’ detention of the activist, Mahmoud Khalil, a…

Mark Carney, Canada’s soon-to-be prime minister, weathered two era-defining implosions in his career as a central banker: the 2008 global financial crisis and Brexit. He has dealt with political chaos, societal upheaval and economic meltdown. Now he faces what is arguably the challenge of a lifetime: Donald J. Trump. Can Mr. Carney negotiate with Mr.…

The Justice Department’s pardon attorney was dismissed a day after she refused to recommend that the actor Mel Gibson, a prominent supporter of President Trump’s, should have his gun rights restored, according to the attorney and others familiar with the situation. Elizabeth G. Oyer, the former pardon attorney, described the sequence of events as an…

Ukrainian forces have stalled the Russian offensive in the eastern Donetsk region in recent months and have started to win back small patches of land, according to Ukrainian soldiers and military analysts. Russia still holds the initiative, and conducts dozens of assaults across the eastern front every day, the soldiers and analysts say. But after…

Beth Crowell was proud to work for the Internal Revenue Service. She had spent much of her career as an accountant for large corporations, gaining intimate knowledge about how they do — and sometimes don’t — pay the taxes they owe. Working for the I.R.S. in Colorado, she hoped to put her skills to a…

Federal immigration authorities on Saturday detained a well-known activist who played a major role in Columbia University’s pro-Palestinian student movement last year, his lawyer said on Sunday. The arrest of the activist, a legal permanent resident of the United States, was a significant escalation of President Trump’s crackdown on what he has called antisemitic campus…

Amid a generational crisis in Canada’s relationship with the United States, the Liberal Party of Canada on Sunday chose an unelected technocrat with deep experience in financial markets to replace Justin Trudeau as party leader and the country’s prime minister, and to take on President Trump. Mark Carney, 59, who steered the Bank of Canada…

The Trump Administration’s abrupt withdrawal of $400 million in federal funding from Columbia University cast a pall over at least nine other campuses worried they could be next. The schools, a mix that includes both public universities and Ivy League institutions, have been placed on an official administration list of schools the Department of Justice…