There have been no rulings on the constitutionality of his detention. They got an immigration judge to stamp the deportation (but not the warrantless arrest!), which was promptly halted by a federal court which agreed to hear the challenge (because, yes, a warrantless arrest and deportation without trial is fucking batshit per the clear language of the fourth amendment).

Attempting to spin that as "the courts ruled it was OK" is just Orwellian. The position of his jailers is that he remains in jail forever (either her or El Salvador or wherever) without right to trial.