The American Civil Liberties Union (ACLU) said on Friday that it would sue President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE over his "blatantly illegal" national emergency declaration at the southern border.

"We’re suing President Trump over today’s blatantly illegal declaration of a national emergency," the ACLU tweeted. "There is no emergency. This is an unconstitutional power grab that hurts American communities. We’ll see him in court."

BREAKING: We’re suing President Trump over today’s blatantly illegal declaration of a national emergency.



There is no emergency. This is an unconstitutional power grab that hurts American communities. We’ll see him in court. — ACLU (@ACLU) February 15, 2019

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The ACLU's is one of several incipient legal challenges to the president's border move.

Trump on Friday declared a national emergency that would allow him to reallocate funds for a wall at the southern border after signing a congressional spending bill that gave less money than he wanted for the long-promised project.

Trump said during a Rose Garden press conference on the declaration that he "didn't need to" declare the national emergency but wanted "faster" action on a border wall.

After the president said this, ACLU immigrants' rights project director Omar Jadwat taunted him on Twitter, implying the remarks would help their legal case.

keep talking mr president — Omar C. Jadwat (@OmarJadwat) February 15, 2019

Trump also said at the conference that he "expects" to be sued over the emergency declaration and predicted a loss in federal court.

"We will possibly get a bad ruling, and then we'll get another bad ruling and then we'll end up in the Supreme Court," Trump said.

He added that he hopes he will "get a fair shake and we'll win in the Supreme Court, just like the [travel] ban."

“We have not seen any of the threatened lawsuits,” a White House official said when asked for comment by The Hill. The official said they are “not sure how to respond to lawsuits we have not seen, that have only been threatened.”

—Updated at 3:36 p.m.