Tomas Harrison

BOSTON (CN) — President Donald Trump’s effort to limit birthright citizenship came under attack during oral argument in the First Circuit late Friday, with the judges repeatedly expressing deep skepticism that his executive order is constitutional — although they also expressed some doubt about whether the states and organizations bringing the cases had standing to challenge it.

“Since 1940, everybody in the executive branch has with incredible regularity been operating on the understanding” that there’s birthright citizenship, noted Chief U.S. Circuit Judge David Barron.

“And suddenly the government says, ‘You know, actually, we’re thinking of another way now.’ That’s a funny way to run a railroad.”

Trump’s order denying citizenship to children born to undocumented migr

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