As we reported, a federal judge today temporarily blocked President Trump's executive order to end birthright citizenship.

The first legal test for the president amid his flurry of week one immigration actions.

Birthright citizenship was enshrined in the Constitution in 1868 and upheld in a landmark Supreme Court ruling in 1898 in the case of a young Chinese-American

cook named Wong Kim Ark. Today, nearly two dozen states are suing President Trump over his

order to end it. Washington State is one of them, and Attorney General Nick Brown joins me now.

Attorney General Brown, welcome to the News Hour. Thanks for joining us.

Thank you for having me. So let's begin with that news today of the federal judge in Seattle,

temporarily blocking President Trump's executive order and calling it blatantly unconstitutional.

What's your reaction to that ruling? Well, we're obviously very happy with the judge's ruling today.

Washington brought a case along with Arizona, Oregon, and Illinois to challenge that executive order.

We brought our complaint in temporary restraining order and to hear the judge from the bench say today that it was blatantly unconstitutional,

to say that in his four decades since being appointed by President

Reagan that he has never seen something so obviously illegal was very heartening and reaffirmed

that we need to protect and defend the Constitution of the United States. And it's this first

step of many to come, but really happy with the team's effort and the collaboration with other

Attorney General's. Do you take today's ruling as any kind of indication of what could come in your

case? Well, we've certainly got a long way to go. This is only a temporary restraining order,

but it has really important impact. Effectively nationwide, the Department of Justice and

many other agencies and federal government

are ordered to put their pens down and cannot take any action from enforcing or implementing

this executive order. So they have to stop. Well, the clause at the heart of all this is something

it's enshrined on the 14th Amendment of the U.S. Constitution. It reads this way.

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