It was a fatal blow for a group of states trying to kick Trump off the ballot and came just 24 hours before 15 states vote on Super Tuesday.
In an immediate reaction Trump declared on his Truth Social network: 'BIG WIN FOR AMERICA!!!'
He also reportedly called the ruling 'unifying' and 'inspirational'.
The 9-0 decision by the conservative-majority court in the high-stakes case means the Republican frontrunner's name will appear on voting slips in the Colorado Republican primary tomorrow.
