A Supreme Court decision pushing for the return of a man mistakenly deported to a Salvadoran prison has both his lawyers and the Trump administration claiming victory, leaving unclear if and when

The U.S. Supreme Court late Thursday delivered the administration its most substantial court loss of President Donald Trump’s second term. But the situation is far from over. And it has raised the possibility of a high-profile constitutional clash,

Such a ruling puts down a marker that can be a check on the Trump administration’s claim that the president alone had the power to decide who is arrested and deported. It also will slow the pace of deportations. Hundreds of prisoners were deported on March 15 only because none of them were given a legal right to challenge their removal.