Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. A coalition of state attorneys general filed a remarkable brief on Monday overflowing with spite toward the one group that apparently has not suffered enough yet from the chaotic moves of the new presidential administration: infants. The 18 AGs, all Republicans, urged a federal court to uphold Donald Trump’s assault against birthright citizenship on the grounds that their states are injured by immigrant mothers and their babies. The federal government, they argued, should deny American citizenship from these American...