Thirteen people were arrested at Princeton University on Monday after occupying a campus building‚ an incident the university president called “completely unacceptable.” The “Princeton Gaza Solidarity Encampment” began on Thursday when roughly 50 people set up tents in McCosh Courtyard. After immediately receiving a warning that the tents violated school policies‚ the protesters disassembled the tents and transitioned to holding a sit-in with singing‚ chants‚ and drums. National Review...