A student at US’ Columbia University, Mahmoud Khalil, who participated in last year’s pro-Palestinian protests on campus was arrested by immigration officials on Saturday. Trump said that Khalil’s arrest is “the first of many to come” of students “who have engaged in pro-terrorist, anti-Semitic, anti-American activity”. This comes after Trump signed executive order in January, which cites a federal law authorizing the deportation of any foreign national.