The Supreme Court announced a key victory for the Trump administration, which was seeking to divert $2.5 billion of funding in order to construct his promised border wall.
Critics of the president argued that Congress has the "power of the purse" as expressed in the Constitution and it was outside of executive power to divert funds from projects they voted for to a project they rejected.
Five justices on the Supreme Court said that the administration could continue construction, striking down decisions by lower courts to freeze the action. Four liberal justices dissented.
The litigation was made on the behalf of the Sierra Club and Southern Border Communities Coalition by the ACLU.
The president tweeted in celebration of the decision from his official social media account.
"Wow! Big VICTORY on the Wall," he tweeted.
"The United States Supreme Court overturns lower court injunction, allows Southern Border Wall to proceed," he added. "Big WIN for Border Security and the Rule of Law!"
Here's more on the momentous ruling:
Supreme Court allows White House to tap Pentagon funds for wall www.youtube.com