tl;dr: The Supreme Court ruled 6-3 to uphold birthright citizenship under the 14th Amendment, rejecting the Trump administration's executive order that sought to deny citizenship to children born in the US to parents in the country illegally or temporarily. Chief Justice Roberts' majority opinion grounded the ruling in English common law and Reconstruction history, while Justice Thomas dissented, arguing the Citizenship Clause was narrowly intended for freed slaves. In response, the DOJ directed prosecutors to crack down on "birth tourism" schemes, and Trump called on Congress to legislate against birthright citizenship despite the constitutional ruling.