A federal judge on Thursday temporarily blocked President Donald Trump’s executive order denying U.S. citizenship to the children of parents living in the country illegally, calling it “blatantly unconstitutional” during the first hearing in a multi-state effort challenging the order.

President Trump's executive order challenging birthright citizenship will face its first legal test in a Seattle courtroom Thursday.

In a Washington state federal court Thursday a judge called President Trump's executive order seeking to end birthright citizenship for undocumented migrants "blatantly unconstitutional," temporarily blocking it . On Capitol Hill, the president's allies introduced a bill to make it law.