Standing amid a throng of fellow protesters outside th Thursday morning, Young Woon Han was worried about his future son or daughter.

The case concerns a Constitutional provision that babies born on American soil are American citizens. NJ Solicitor General Jeremy Feigenbaum argued the case on behalf of the 22 states that sued.

The Supreme Court on Thursday seemed open to lifting a series of nationwide orders blocking President Donald Trump from enforcing his birthright citizenship policy even as several of the justices wrestled with the practical implications of allowing the government to deny citizenship to people born in the US.