Federal agents did not have a warrant when they arrested Mahmoud Khalil, a Columbia University student who had been an outspoken advocate for Palestinian rights, according to court documents.

The forceful detention was captured on video by a local teacher who witnessed the incident with his young daughter.

Ann Coulter is to the right of many people on the issue of immigration, leading her on occasion to publicly spar with President Donald Trump on the issue, as she did in a tweet Monday, calling out the ...