A federal judge in Boston said on Friday he would take under advisement a request from 18 state attorneys general to block President Donald Trump’s executive order ending birthright citizenship for the children of parents who are in the U.

The lawsuit was filed the day after President Trump signed the executive order that aimed to end birthright citizenship, in violation of the 14th Amendment and the Immigration and Nationality Act. They are asking the federal judge to prevent the president’s order from taking effect.

The Justice Department argued that the 14th amendment has been misinterpreted by the Supreme Court and doesn’t grant birthright citizenship to children of people who are unlawfully present.