“US citizen” and implying some higher necessity of honoring his rights is a false dichotomy, Under the U.S. Constitution (especially the 5th and 14th Amendments), all “persons” (not just citizens) are entitled to due process protections. Further, even outside of his applicability to INA, he was explicitly granted a Withholding of Removal, and was specifically barred from any removal with the end destination being El Salvador. The Supreme Court also unanimously ruled his deportation as illegal. This is settled law through ANY and EVERY avenue you look at it. There are no straws to grasp.