Brad Lander, New York City Comptroller and Democratic mayoral aspirant, was apprehended by federal agents at an immigration court after physically intervening with an individual the authorities were endeavouring to detain; Lander, present at the Manhattan federal building to monitor immigration proceedings, interceded as agents moved to take a man into custody upon his exit from the courtroom, physically impeding them while demanding to inspect the relevant judicial warrant, precipitating his own arrest, the agents having forcibly separated the two; subsequent to his release, Lander asserted his actions constituted non-violent dissent against the Trump administration's immigration policies, the incident occurring amidst a nationwide upsurge in large-scale arrests conducted proximate to immigration court facilities, with Lander's detention eliciting censure from fellow Democratic candidates and political figures alike.