Trump administration's decision to revoke visas for Chinese students in the United States, particularly those with ties to the Chinese Communist Party or studying in sensitive fields. This unprecedented move is described as the boldest crackdown on international students yet, with new visa appointments also being halted for Chinese students. China has lodged a diplomatic protest, calling the action unreasonable and targeted. The report highlights the significant impact this could have on US universities, the economy, and research, noting that national security concerns regarding espionage and intellectual property theft have long lingered. The timing of this action is also considered, as it adds a new layer of confrontation to the ongoing trade war.