Washington state is suing the Trump administration over the president's executive order to end birthright citizenship, with Arizona, Oregon, and Illinois joining the lawsuit. Why it matters: The legal challenge,

Brown on Tuesday announced a lawsuit targeting Trump’s executive order that aims to end birthright citizenship. Washington’s new AG, who was sworn in last week, decried the directive as “unconstitutional,” “cruel” and “simply un-American.”

Legal experts say the undocumented population would grow and that all Americans would be impacted if Trump’s order ending birthright citizenship takes effect.