Concord, New Hampshire - Immigrants' rights advocates launched a lawsuit late Monday seeking to stop newly inaugurated president Donald Trump's executive order to end birthright citizenship.

The lawsuit was filed by the American Civil Liberties Union (ACLU), ACLU of New Hampshire, ACLU of Maine, ACLU of Massachusetts, Asian Law Caucus, State Democracy Defenders Fund, and Legal Defense Fund on behalf of New Hampshire Indonesian Community Support, the League of United Latin American Citizens (LULAC), and Make the Road New York.

The suit argues that Trump's new order violates the 14th Amendment to the Constitution, which guarantees "all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside."

"Denying citizenship to US-born children is not only unconstitutional – it’s also a reckless and ruthless repudiation of American values," ACLU Executive Director Anthony D. Romero said in a statement.

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"This order seeks to repeat one of the gravest errors in American history, by creating a permanent subclass of people born in the US who are denied full rights as Americans. We will not let this attack on newborns and future generations of Americans go unchallenged," Romero continued.

"The Trump administration's overreach is so egregious that we are confident we will ultimately prevail."

The suit was filed in New Hampshire on behalf of people whose children would not be recognized as citizens under the new Trump order.

"With this executive order, the president of the United States is once again attempting to violate the civil rights of American citizens and their immigrant family members," said Juan Proaño, chief executive officer of LULAC. "This effort to demonize Brown and Black immigrants targets all immigrants in this country, regardless of their background. If not stopped, it will undermine the very essence of what it means to be an American and will tear families apart."

Aarti Kohli, executive director of the Asian Law Caucus, insisted, "If you’re born here, you are a citizen – period. No politician, including President Trump, can decide who is American and who is not."