Republican voters delivered a stark repudiation Tuesday of Donald Trump's "Big Lie" that the 2020 US election was stolen, backing Georgia Governor Brian Kemp for re-election by a huge margin over a candidate recruited by the former president.

Trump had banked much of his own political capital hand-picking David Perdue to oust Kemp in the nominating contest to compete for the governor's mansion in November's midterm elections.

Voters visit polling places to cast their ballots in the 2022 Primary Election on May 24, 2022 in Atlanta, Georgia
Voters visit polling places to cast their ballots in the 2022 Primary Election on May 24, 2022 in Atlanta, Georgia GETTY IMAGES NORTH AMERICA via AFP / Megan Varner

Perdue made Trump's bogus claims about 2020 a centerpiece of his campaign, in a direct appeal to his endorser's supporters who continue wrongly to question the validity of the outcome.

But the former senator was forced to concede, in an embarrassing blow for Trump, as the early count showed him trailing by almost 50 points less than 90 minutes after polls closed.

"Four years of the Kemp administration will mean that you keep all of your hard-earned money," Kemp said in his victory address.

Former vice president Mike Pence, at an election eve campaign event for Georgia Governor Brian Kemp -- Pence's support for a candidate Donald Trump reviles highlights the party's internal tug of war over its future direction 
Former vice president Mike Pence, at an election eve campaign event for Georgia Governor Brian Kemp -- Pence's support for a candidate Donald Trump reviles highlights the party's internal tug of war over its future direction  GETTY IMAGES NORTH AMERICA via AFP / JOE RAEDLE

"Your communities will be safe. Your kids will be in school without fear of partisan agendas in the classroom. Parents will have a voice and we'll keep working to bring good paying jobs to every corner of our state."

Kemp, frequently the target of Trump's wrath for refusing to help overturn the election, was always expected to win, but the margin of defeat represents a stinging rebuke of Trump from a state he lost by the narrowest of margins in 2020.

Five states were holding nominating contests for congressional elections that will decide which party controls the US Senate and House of Representatives for the remainder of President Joe Biden's first term.

Former president Donald Trump (right) appears to have soured on Georgia gubernatorial hopeful David Perdue
Former president Donald Trump (right) appears to have soured on Georgia gubernatorial hopeful David Perdue AFP / Andrew CABALLERO-REYNOLDS

But all eyes are on Georgia, where wounds from the 2020 presidential election are still festering two years after Biden won the state by under 12,000 votes.

Up and down the ballot, the Republican side of the Georgia primary pitted candidates peddling the former president's election fraud claims against hopefuls who pushed back in defense of the Constitution.

A voter casts a ballot at a polling station in Atlanta, Georgia, where former president Donald Trump's role as Republican kingmaker is being tested
A voter casts a ballot at a polling station in Atlanta, Georgia, where former president Donald Trump's role as Republican kingmaker is being tested GETTY IMAGES NORTH AMERICA via AFP / Jessica McGowan

The race to be Georgia's secretary of state is seen as equally consequential as the contest for governor, as these are the officials who oversee elections in the United States.

Georgia's Brian Kemp is comfortably ahead of primary rival David Perdue in his bid to be reinstalled as the state's governor
Georgia's Brian Kemp is comfortably ahead of primary rival David Perdue in his bid to be reinstalled as the state's governor GETTY IMAGES NORTH AMERICA via AFP / Elijah Nouvelage

Democrats fear that, across the country, Trump will be able to install loyalists who can weaponize specious fraud accusations from 2020 to make it harder for his opponents to vote in 2024.

As the man responsible for certifying Georgia's 2020 election results, Brad Raffensperger was in lockstep with Kemp in pushing back against Trump, making him another key target for the former president's vengeance.

He defeated Jody Hice, one of more than a dozen Trump-backed candidates across America bidding to become secretary of state and professing to believe the 2020 election was stolen.

With 98 of precincts reporting, Raffensperger had 52 percent of the vote, clearing the 50 percent threshold that allowed him to avoid going into a head-to-head run-off and enabling him to declare victory outright.

In a grueling night for Trump, another of the election deniers he endorsed, John Gordon, lost his challenge to Georgia Attorney General Chris Carr.

Biden was the first Democratic presidential candidate since 1992 to win Georgia, while Raphael Warnock and Jon Ossoff triumphed in runoff elections in January 2021 that wrested control of the US Senate from Republicans.

Warnock cruised through his primary and will face Trump-backed football star Herschel Walker, who had an easy night too, sailing to the Republican nomination for Senate.

Georgia's Democrats are doing all they can to cement their 2021 gains, headlined by Democratic star campaigner Stacey Abrams, who is unopposed in her bid for governor.

Abrams courted controversy over the weekend with remarks that Georgia is the "worst state in the country to live," citing its healthcare and crime statistics, rising incarceration rates and falling wages.

At a news conference Tuesday, she attempted to clean up a comment that Republicans have seized on as a sign of her lack of local pride, faulting herself for an "inelegant delivery" of her message.

In a brief concession speech, Perdue backed Kemp in his bid to see off Abrams's challenge.

"We're going to make sure Stacey Abrams is not governor of the state," he said.

Nominating contests are also being held in Minnesota, Alabama, Arkansas and Texas, where a school shooting that left 19 children dead had cast a grim pall over the state's primary.