In a bombshell decision, Colorado’s Supreme Court on Tuesday ruled that former President Donald Trump‘s candidacy in the state’s primary next year is prohibited on constitutional grounds.

The first-of-its kind ruling stems from a lawsuit that focused a little-known provision in the 14th Amendment of the U.S. Constitution. Similar challenges in other states have proven unsuccessful.

“A majority of the court holds that President Trump is disqualified from holding the office of President under Section Three of the Fourteenth Amendment of the United States Constitution,” the Colorado ruling said. “Because he is disqualified, it would be a wrongful act under the Election Code for the Colorado Secretary of State to list him as a candidate on the presidential primary ballot.”

The court put its decision on hold until Jan. 4 to allow for further appeals. It also said that if the matter is pursued before the U.S. Supreme Court before that date, the pause will remain in effect during that time.

Steven Cheung, a spokesperson for Trump’s campaign, bashed the ruling and signaled that an appeal to the U.S. Supreme Court was forthcoming.

“Unsurprisingly, the all-Democrat appointed Colorado Supreme Court has ruled against President Trump, supporting a Soros-funded, left-wing group’s scheme to interfere in an election on behalf of Crooked Joe Biden by removing President Trump’s name from the ballot and eliminating the rights of Colorado voters to vote for the candidate of their choice,” Cheung said in a statement.

“We have full confidence that the U.S. Supreme Court will quickly rule in our favor and finally put an end to these unAmerican lawsuits,” he added.

In their ruling, the Colorado judges said: “We do not reach these conclusions lightly. We are mindful of the magnitude and weight of the questions now before us. We are likewise mindful of our solemn duty to apply the law, without fear or favor, and without being swayed by public reaction to the decisions that the law mandates we reach.”