Columbia University activist Mahmoud Khalil and seven of his fellow students sued the school and Congress on Thursday for handing over thousands of disciplinary records to the federal government as President Donald Trump threatens to crack down on student protesters. Khalil, 30, a green card holder, was arrested Saturday night by federal immigration agents as he returned home to his Columbia-owned apartment with his wife, a U.S. citizen who is eight months pregnant. Khalil was an international affairs graduate student and a lead negotiator during pro-Palestinian campus protests. On Thursday, a protest billed as an emergency rally to defend Khalil will take place on the South Park Blocks that run through the Portland State University campus. Like Columbia, Portland State has drawn the attention of the Trump administration, which launched an investigation of alleged antisemitism at the university following a pro-Palestinian protest that occupied the main campus library last spring. The Trump administration is investigating 59 other colleges and universities, including Columbia. Also Thursday, demonstrators from a Jewish group filled the lobby of Trump Tower to denounce Khalil’s immigration arrest. The demonstrators from Jewish Voice for Peace wore red shirts reading “Jews say stop arming Israel” and held up banners as they chanted “Bring Mahmoud home now!” on the lower level of the Fifth Avenue building’s public atrium. After warning the protesters to leave, police said they arrested 98 people who stayed on various charges, including trespassing, obstruction and resisting arrest. — Tribune Content Agency, The Associated Press and The Oregonian/OregonLive contributed to this report.