Columbia protesters "face expulsion" if they don't leave occupied campus building

Columbia University warned protesters who breached an administrative building Tuesday that they would face expulsion as tensions over pro-Palestinian demonstrations on campus continue to escalate.

The big picture: Dozens of protesters barricaded entrances of a building on the Ivy League campus in Manhattan in the middle of the night after the university began suspending students for refusing to leave their on-campus encampment after school leadership imposed a deadline.

What they're saying: "We regret that protesters have chosen to escalate the situation through their actions," the university said in a letter...