The ruling makes Trump the first presidential candidate in US history to be deemed ineligible for the White House under a rarely used provision of the US Constitution that bars officials who have engaged in “insurrection or rebellion” from holding office.

The court concluded that the US Constitution bars the frontrunner for the Republican nomination in 2024 from appearing on the ballot because of his role instigating violence against the US government.

Trump supporters fight their way into the Capitol on January 6, 2020. Photo AAP

The ruling applies only to the state’s March 5 Republican primary, but its conclusion would likely also affect Trump’s status for the November 5 general election.

Non-partisan US election forecasters view Colorado as safely Democratic, meaning that President Joe Biden will likely carry the state regardless of Trump’s fate.

The case was brought by a group of Colorado voters, aided by the group Citizens for Responsibility and Ethics in Washington, who argued that Trump should be disqualified for inciting his supporters to attack the Capitol in a failed attempt to obstruct the transfer of presidential power to Biden after the 2020 election.

Armed Capitol police try to stop Trump supporters entering the Congress chamber’s barricaded doors. Photo: AAP

Trump is likely to appeal the ruling to the US Supreme Court.

His campaign has condemned 14th Amendment challenges as an attempt to deny millions of voters their preferred choice for president.

The decision is a victory for advocacy groups and anti-Trump voters who have mounted several similar legal challenges to Trump’s candidacy under section 3 of the 14th Amendment, which was enacted after the Civil War.

The ruling from a court whose justices were all appointed by Democratic governors marks the first time in history that Section 3 of the 14th Amendment has been used to disqualify a presidential candidate.

The decision reverses a ruling by a lower court judge who found Trump engaged in insurrection by inciting his supporters to violence, but, as president, Trump was not an “officer of the United States” who could be disqualified under the amendment.

A lawyer for Trump argued that the riot at the Capitol was not serious enough to qualify as an insurrection and that Trump’s remarks to his supporters in Washington that day were protected by his right to free speech.

The lawyer contended that courts do not have the authority to order Trump removed from the ballot.

Advocates have hoped to use the case to boost a wider disqualification effort and potentially put the issue before the US Supreme Court.

The US Supreme Court’s 6-3 conservative majority includes three Trump appointees.

– AAP

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