The Colorado State Democratic Party, reflecting the anger of rank-and-file Democratic voters, rebuked Gov. Jared Polis on Wednesday over his decision to release Tina Peters from prison.

Gov. Jared Polis of Colorado, a Democrat, was censured by his own party on Wednesday night over his decision to free Tina Peters, a high-profile election denier and supporter of President Trump who had been serving a nine-year prison sentence for tampering with voting machines.

The censure by the Colorado State Democratic Party came after more than 700 infuriated Democrats signed onto a grass-roots effort to rebuke Mr. Polis for commuting Ms. Peters’ prison sentence last week. The censure measure, voted on during a state party central committee meeting on Wednesday night, passed with 89.8 percent support.