Greene also is part of a growing list of candidates who have expressed support for QAnon, the far-right US conspiracy theory popular among some supporters of President Donald Trump.
Lauren Boebert, another candidate who has expressed support for QAnon, recently upset a five-term congressman in a Republican primary in Colorado.
Marjorie Taylor Greene has positioned herself as a staunch Trump supporter and emphasizes a strongly pro-gun, pro-border wall, and anti-abortion message.
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She has also connected with voters through an intensive effort to travel the district and meet people on the ground.
Larry Silker, a 72-year-old retiree, cast a ballot for Marjorie Taylor Greene last week at an early voting location in Dallas, Georgia.
“She seems to be a go-getter, you know. She’s out seeing everybody that she can, and I think that’s nice,” Silker said.
Asked whether he had seen criticism of Greene’s remarks, Silker said: “Well yeah, you know, you see it. But do you put faith in it? You just have to weigh it out.”
Voter Pamela Reardon said she supports Greene because she connects with people, and she’s anti-abortion, a defender of the Second Amendment and “a true Christian”.
“I got behind her because of her honesty,” she said. “She’s not going to be bought by anybody. I could tell that her heart was pure.”
Reardon is familiar with criticism of Greene’s social media posts and videos but says “she’s never said anything racist like they say she has,” and blamed attacks by her opponent's campaign.
The district stretches from the outskirts of metro Atlanta to the largely rural northwest corner of the state.
Greene will face Democrat Kevin Van Ausdal in November.
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Kevin Van Ausdal acknowledged that he faces an uphill battle in the heavily conservative district in an interview Tuesday night and called on people across the country to rally behind his campaign.