The Supreme Court cleared the way Friday for the Trump administration to tap billions of dollars in Pentagon funds to build sections of a border wall with Mexico, Associated Press reports.

The court’s five conservative justices gave the administration the greenlight to begin work on four contracts it has awarded using Defense Department money. Funding for the projects had been frozen by lower courts while a lawsuit over the money proceeded. The court’s four liberal justices wouldn’t have allowed construction to start.

The justices’ decision to lift the freeze on the money allows President Donald Trump to make progress on a major 2016 campaign promise heading into his race for a second term. Trump tweeted after the announcement: “Wow! Big VICTORY on the Wall. The United States Supreme Court overturns lower court injunction, allows Southern Border Wall to proceed. Big WIN for Border Security and the Rule of Law!”

ACLU lawyer Dror Ladin said after the court’s announcement that the fight “is not over.” The case will continue, but the Supreme Court’s decision suggests an ultimate victory for the ACLU is unlikely. Even if the ACLU were to win, fencing will have already been built.

House Speaker Nancy Pelosi issued a statement Friday night accusing Trump of trying to “undermine our military readiness and steal from our men and women in uniform to waste billions on a wasteful, ineffective wall that Congress on a bipartisan basis has repeatedly refused to fund.” She said the Supreme Court’s decision “undermines the Constitution and the law.”

Senate Democratic Leader Chuck Schumer of New York called the decision “deeply regrettable and nonsensical.”

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