In a momentous ruling that may shape U.S. political history, the Colorado Supreme Court has ruled that former president Donald Trump engaged in insurrection and is therefore disqualified from the presidency.

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The decision by Colorado’s highest court, the first of its kind involving Trump, would keep him off the 2024 primary ballot in the state over his role in the Jan. 6, 2021, insurrection.

A state district court previously ruled that Trump had engaged in insurrection but that the relevant section of the 14th Amendment did not apply to presidents. The state Supreme Court upheld the former finding and reversed the latter, in a 4-3 decision.

The Post’s Patrick Marley, who reports on voting rights and democracy, explains the historical roots of the ruling and how it may have a broader political impact for Trump.