ATLANTA — Former Lt. Gov. Geoff Duncan has been expelled from the Georgia Republican Party for endorsing Vice President Kamala Harris for president last year.

“By his pattern of conduct, Duncan has forfeited any claim to being even a nominal ‘Republican,’ ” the state GOP’s executive committee wrote in a resolution its members passed unanimously on Monday.

While the resolution doesn’t mention it, Duncan first fell into disfavor with Georgia Republicans by refusing to support former President Donald Trump’s efforts to overturn the results of the 2020 presidential election in Georgia. President Joe Biden became the first Democratic presidential nominee to carry the Peach State since Bill Clinton in 1992.

Subsequently, Duncan endorsed Biden’s reelection bid, then supported Harris when Biden dropped out of the 2024 race.

Toward that end, he made numerous speeches on behalf of the Harris campaign and served as a political commentator on CNN during the months leading up to the November election.

The resolution also accused Duncan of working against the candidacies of Republicans Burt Jones for lieutenant governor and Herschel Walker for the U.S. Senate. Jones was elected lieutenant governor in 2022, while Walker lost to incumbent Democratic Sen. Raphael Warnock.

Duncan responded Monday on social media, asserting Georgia Republicans should have more important concerns.

“Hard to believe this is a good use of time for a party that’s only got a limited amount of time to figure out mass deportations, world peace and global tariffs,” he wrote. “Learn how to take a victory lap not light another dumpster fire.”

The resolution prohibits Duncan from qualifying to run in future races as a Republican. It also bans him from “all property owned or leased by the Georgia Republican Party and all events held by or under the authority of the Georgia Republican Party.”

After serving three terms in the state House of Representatives, Duncan was elected lieutenant governor in 2018. He opted not to seek a second term in 2022.