Mohsen Mahdawi, a legal permanent resident, has lived in the United States for 10 years and was arrested in Vermont. He has not been charged with a crime. On Monday morning, Mr. Mahdawi turned up for an interview he had been told was related to his naturalization. Instead, immigration officers, some with their faces covered, placed Mr. Mahdawi in handcuffs and arrested him, according to a statement Monday from Vermont’s two senators, Bernie Sanders, an Independent, and Peter Welch, a Democrat, and Representative Becca Balint, a Democrat.
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