“What’s happening in France is nothing less than out of control mass migration.”

President Trump reacts to France's student revolt exploding into a nationwide crisis.

Tens of thousands are taking to the streets as high school students demand action over teacher shortages, overcrowded classrooms and deteriorating buildings. Nearly 900 schools have been affected, while more than 6,100 people have been arrested, most of them minors.

The unrest is turning increasingly tense, with barricades, fires and clashes with riot police as the movement enters its third week.