Mahmoud Khalil, a pro-Palestinian activist and legal permanent resident of the U.S., was arrested by federal immigration authorities due to concerns that his presence could negatively impact U.S. foreign policy, potentially leading to his deportation. A federal judge has temporarily halted the deportation process, allowing Khalil's legal team to prepare for a court hearing on Wednesday to challenge the charges. The case has garnered attention because of Khalil's activism and could set a precedent for other legal permanent residents involved in activism perceived as conflicting with U.S. foreign policy.