Colorado Democratic lawmakers are celebrating the U.S. Supreme Court’s decision to uphold birthright citizenship, rejecting one of President Donald Trump’s first executive orders from the president’s first day in office.

On Tuesday, the Supreme Court rejected the order with a 6-3 vote, upholding that children born on United States territory — regardless of the parents’ legal status — are American citizens.

Chief Justice John Roberts wrote the majority opinion, held by both conservatives and liberals. Three conservative justices — Justices Samuel Alito, Neil Gorsuch and Clarence Thomas — voted to uphold Trump’s proposed restrictions.

“Today, the Supreme Court reaffirmed the long-standing right to citizenship enshrined in the Constitution: If you are born in this country, you are a U.S. citizen,” said Colorado Attorney General Phil Weiser in a June 30 news release. “The president issued his birthright citizenship executive order with blatant disregard for the Constitution. It’s astonishing that we had to fight this case because the Citizenship Clause of the 14th Amendment is so plainly clear.”

The 14th Amendment of the U.S. Constitution states that “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.”

Trump’s day one order fulfilled one of his campaign promises, kicking off his administration’s crackdown on immigration.

The order declared that any future children born in the United States to individuals who are in the country illegally or temporarily — including those with student and tourist visas — would no longer be granted citizenship.

On the second day of Trump’s term, Colorado joined a coalition of 18 states in suing to block the executive order. The lawsuit, filed in the Federal District Court in Massachusetts, claimed the order violated the constitutional rights afforded to all children born in the United States and sought to halt any actions that would implement it.

The suit argued that, if upheld, the order would “strip citizenship from thousands of babies born in Colorado and across the country, denying them basic rights and protections,” according to Weiser’s office. Children would have lost access to Social Security numbers, federal programs, lawful employment, and would have been unable to obtain passports, vote, serve on juries or run for certain offices. 

The lawsuit was successful, obtaining nationwide preliminary injunctions that blocked Trump’s executive order from taking effect.

“Birthright citizenship is a cornerstone of our Constitution and rests on the belief that all Americans are equal under the law. Any attempt to revoke or undermine that constitutional guarantee is unlawful, and the Supreme Court agrees,” said U.S. Senator Michael Bennet in a Tuesday news release.

“Just a few years ago, it would have been unthinkable to question the legality of birthright citizenship,” reads a statement from the General Assembly Democrats, including Elizabeth Velasco from Glenwood Springs. “While today’s decision reaffirms common sense and the fundamental promise of our democracy, it is a sobering reminder of how this administration is willing to undermine our rights, restrict our constitutional freedoms, and divide our communities for political gain.”