"This is the first arrest of many to come," the president said of Mahmoud Khalil, a green card holder abducted by immigration agents and sent to Louisiana.

What happened to Mahmoud Khalil? In March 2025, the Columbia University student was arrested by Department of Homeland Security agents. Here's what we know.

The administration has alleged the school failed to combat campus anti-Semitism amid Israel-Gaza protests.

The Trump administration says it’s pulling $400 million from Columbia University. Multiple federal agencies announced Friday that they're canceling grants and contracts because of what the government describes as the Ivy League school’s lackluster efforts to squelch antisemitism on campus.

Columbia University's interim president said the school is working to address the "legitimate concerns" of U.S. President Donald Trump's administration after $400 million of federal government grants and contracts to the university were canceled over allegations of antisemitism on campus.

Markets tumble after Trump announces new Canada tariffs fueling even more recession fears - President says new tariffs to go into effect Wednesday morning as he retaliates for 25 percent surcharge Canadian electricity exporters placed on power to northern U.