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@EWess92, Solicitor General, Iowa Office of the Attorney General, explains what he thinks Trump v. Barbara settled:
“I think Barbara settled one question in the near term, and that’s the president cannot, by executive order, revoke citizenship from parents who are unlawfully or temporarily present. Five justices got there through the Constitution, Justice Kavanaugh got there through statute… Presidential unilateral action is out, but I think there’s room for innovative legislation to, again, kind of poke around the edges.”