Multiple states and cities are suing President Donald Trump over his executive order ending birthright citizenship. Their argument is that a person born in the United States is a citizen of the United States and is protected under the 14th Amendment to the Constitution.

A federal judge has temporarily blocked President Donald Trump’s executive order ending the constitutional guarantee of birthright citizenship regardless of the parents’ immigration status.

A federal judge Thursday blocked President Donald Trump’s executive order outlawing birthright citizenship—the policy automatically giving citizenship to anyone born in the U.S.—and declared it “blatantly unconstitutional,