KILMAR ABREGO GARCIA was not supposed to be sent back to El Salvador. He came to America illegally around 2011 as a teenager, but had been living in Maryland legally since 2019. He is married to an American citizen, has three American children and, with no criminal history, was ostensibly protected from deportation. Yet he is now languishing in a Salvadorean prison as one of more than 200 migrants deported without due process when Mr Trump invoked the Alien Enemies Act last month. In the Oval Office, Nayib Bukele, El Salvador’s president, said the idea that he would return Mr Abrego Garcia to America was “preposterous”, despite the Supreme Court’s ruling that the Trump administration must facilitate his return.