From historian Heather Cox Richardson's Letters from an American yesterday:

This evening, by a vote of 4–3, the Colorado Supreme Court decided that former president Donald Trump is disqualified from holding office and should be removed from the 2024 ballot in the state, citing Section 3 of the 14th Amendment to the U.S. Constitution.

That section was written in the wake of the Civil War, after former Confederates had reelected to Congress men who had left in 1861 to try to destroy the United States government after voters elected Abraham Lincoln.

The section reads: “No person shall be a Senator or Representative in Congress, or elector of President and Vice-President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof.”

Six Colorado Republican and Independent voters challenged Trump’s inclusion on the state’s ballots because of his role in the January 6, 2021, attempt to stop the counting of the nation’s lawful electoral ballots that had elected Democrat Joe Biden president in 2020. Last month, Denver District Court Judge Sarah Wallace ruled that Trump had engaged in insurrection by inciting the riot that led to an attack on the U.S. Capitol but said that Section 3 did not apply to the president.

Today the Colorado Supreme Court agreed that the events at the U.S. Capitol on January 6, 2021, constituted an “insurrection” and that Trump “engaged in” that insurrection through his personal actions, including his incitement of the crowd that breached the Capitol. But it disagreed that the 14th Amendment did not apply to the president.

“The sum of these parts is this,” the court wrote. “Trump is disqualified from holding the office of President under Section Three; because he is disqualified, it would be a wrongful act under the Election Code for the Secretary to list him as a candidate on the presidential primary ballot.”

“We do not reach these conclusions lightly,” the court said. “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.” Colorado voters preferred Democratic candidates to Trump in 2016 and 2020, so this case is less likely to reflect on Colorado in 2024 than it is to open the door to other challenges in swing states.

The president is nothing if not an officer of the United States.