The ACLU of Maine is joining their New England counterparts to sue President Donald Trump over his order to end birthright citizenship.

His order says the federal government won't recognize the birthright of children born to parents in the country without legal status.

In a statement, the executive director of the ACLU said:

Denying citizenship to U.S. born children is not only unconstitutional, it’s also a reckless and ruthless repudiation of American values.

The right to citizenship by birth was established under the 14th Amendment and scholars have questioned how the executive order would survive certain legal challenges.