The Lincoln Project released a new ad on Thursday criticizing Republican Senators Kelly Loeffler and David Perdue and endorsing their Democratic opponents in the upcoming U.S. Senate runoff elections in Georgia.

The conservative group, which opposed the re-election of President Donald Trump, highlighted the Republicans’ criticism of Georgia Secretary of State Brad Raffensperger and accused them of wanting to take away voting rights.

“They’re at it again,” the Lincoln Project tweeted. “Perdue & #KKKelly stand with @realDonaldTrump. We’ve come too far to go back to Jim Crow.”

The 30-second ad uses footage from Civil Rights protests while a narrator says Perdue and Loeffler are “trying to take away our right to vote.”

“David Perdue and Kelly Loeffler support Donald Trump’s plan to strip Georgia voters of our right to vote,” the voiceover goes on, while the video shows headlines from news reports.

The Perdue and Loeffler campaigns, along with the Republican Party of Georgia, filed a lawsuit on December 13 arguing that hundreds of voters in the upcoming runoffs had already voted in states where a senator was on the ballot, which they said is a violation of the Voting Rights Act and thus those voters should not be permitted to vote in the runoffs. The matter relates to claims that people from out of state will vote on January 5. The case was dismissed.

Perdue and Loeffler had previously supported a Texas lawsuit aimed at throwing out the election results in four states Biden won, including Georgia. The Supreme Court declined to hear the case.

“Black and military voters will lose their voice,” the ad’s narrator says before encouraging viewers to vote for Democratic Senate candidates Rev. Raphael Warnock and Jon Ossoff.

“We’ve come too far to go back to Jim Crow. We made history on November 3. Let’s do it again,” the video concludes.

“Jim Crow” is a reference to Segregation-era laws designed to separate Black people from white people and prevent Black voters from casting their ballots, often by applying unfair tests or qualifications for voting registration.

Perdue and Loeffler have joined with other Republicans in criticizing the conduct of the 2020 presidential election. In a joint statement issued on November 9, they called for Georgia’s secretary of state, Brad Raffensperger, to step down.

“There have been too many failures in Georgia elections this year and the most recent election has shined a national light on the problems,” Loeffler and Perdue said. “The Secretary of State has failed to deliver honest and transparent elections. He has failed the people of Georgia, and he should step down immediately.”

Raffensperger has strongly defended the conduct of the election in Georgia, which President-elect Joe Biden won, and dismissed unsubstantiated claims of voter fraud.

Loeffler’s opponent, Jon Ossoff, has also recently criticized her for appearing in a photo with former Ku Klux Klan leader Chester Doles. His comments come in a race where Black voters may be the decisive factor.

“And here’s the bottom line: Kelly Loeffler has been campaigning with a Klansmen. Loeffler has been campaigning, with a Klansmen, and so, I mean, we deserve better than that here in Georgia,” Ossoff told Fox News on December 30.

Newsweek has contacted the Perdue and Loeffler campaigns for comment.

Ivanak Trump with Senators Perdue and Loeffler
Ivanka Trump and Senators Kelly Loeffler (R-GA) and David Perdue (R-GA) wave to the crowd at a campaign event on December 21, 2020 in Milton, Georgia. The two Georgia U.S. Senate runoff elections on Jan. 5 will decide control of the Senate. The Lincoln Project has accused the senators of wanting to take away Georgians’ voting rights.
Elijah Nouvelage/Getty Images