US judge blocks Trump's order to deny birthright citizenship to children of undocumented migrants

Donald Trump's executive order ending birthright citizenship in the US has been blocked by a judge.

Judge John Coughenour has issued a temporary restraining order to clamp down on Donald Trump's ban, which would have seen undocumented migrants in the US unable to register their children as American citizens.

Coughenour claimed the order was "blatantly unconstitutional", and his intervention has seen the move halted for the next 14 days.

"I have been on the bench for over four decades. I can't remember another case whether the question presented was as clear," the judge said.