Justice Ketanji Brown Jackson emerges as a strong voice on an unusually fractious U.S. Supreme Court. Dissenting — again — on the last day of the Supreme Court’s term, in its most high-profile case, Justice Ketanji Brown Jackson did not mince words.

The Supreme Court is clearing the way for the deportation of several immigrants who were put on a flight in May bound for South Sudan, a war-ravaged country where they have no ties.