The practicalities of birthright citizenship being restricted in some states but not others appeared to be a concern of key justices on the US Supreme Court.

President Donald Trump has asked the justices to narrow lower court rulings that blocked his executive order limiting automatic citizenship to babies born with at least one parent who’s a citizen or permanent resident.

Cases and Controversies hosts Greg Stohr and Lydia Wheeler discuss Thursday's arguments and highlight the exchanges that seemed to show the justices are wary of letting Trump start enforcing his restrictions.

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