Welcome to Margin of Error, a politics column from Tom Scocca, editor of the Indignity newsletter, examining the apocalyptic politics and coverage of Campaign 2024. Thursday evening, three days after the Columbia University administration invited the New York Police Department to storm Hamilton Hall and arrest the protesters occupying it, The City reported that one officer had fired a gun inside the building during the raid. In a highlight reel of the action that the NYPD had released, The City noted, police had their guns drawn, and the footage also showed them throwing stun grenades at the students.