Judge blocks Trump's order restricting birthright citizenship

A federal judge blocked Donald Trump's administration from implementing the Republican president's executive order curtailing the right to automatic birthright citizenship in the United States, calling it "blatantly unconstitutional."

Seattle-based US District Judge John Coughenour issued a temporary restraining order at the urging of four Democratic-led states - Washington, Arizona, Illinois and Oregon - preventing the administration from enforcing the order. Trump had signed the order on Monday, his first day back in office.

The judge, an appointee of Republican former President Ronald Reagan, dealt the first legal setback to the hardline policies on immigration that are a centerpiece of Trump's second term as president.

"Obviously we'll appeal," Trump said of Coughenour's ruling.

Trump's executive order had directed US agencies to refuse to recognise the citizenship of children born in the United States if neither their mother nor father is a US citizen or lawful permanent resident.

"I am having trouble understanding how a member of the bar could state unequivocally that this order is constitutional," the judge told a US Justice Department lawyer defending Trump's order. "It just boggles my mind."

The states argued that Trump's order violated the right enshrined in the citizenship clause of the US Constitution's 14th Amendment that provides that anyone born in the United States is a citizen.

"I've been on the bench for over four decades. I can't remember another case where the question presented is as clear as this one. This is a blatantly unconstitutional order," Coughenour said of Trump's policy.

Coughenour's order, announced following a short hearing in a packed courtroom with other judges watching, prevents Trump's policy from being enforced nationwide for 14 days while the judge considers whether to issue a long-lasting preliminary injunction. He will hear arguments over whether to do so on February 6.

Under Trump's order, any children born in the United States after February 19 whose mother and father are not American citizens or lawful permanent residents would be subject to deportation and would be prevented from obtaining Social Security numbers, various government benefits and the ability as they get older to work lawfully.

"Under this order, babies being born today don't count as US citizens," Washington state Assistant Attorney General Lane Polozola, referring to Trump's policy, told the judge during the hearing.

Justice Department lawyer Brett Shumate argued that Trump's action was constitutional and called any judicial order blocking it "wildly inappropriate." But before Shumate had even finished responding to Polozola's argument, Coughenour said he had signed the temporary restraining order.