WASHINGTON — On Tuesday, Republicans successfully defended a key congressional seat, thwarting Democratic ambitions to claim victory in the district once represented by the controversial Marjorie Taylor Greene.

In a significant special election, Clay Fuller, a former prosecutor with a background in the Air National Guard, secured a decisive win over Shawn Harris, a retired Army brigadier general. The race had garnered considerable attention due to its potential implications for the balance of power.

The Associated Press announced Fuller’s victory as he led Harris with 54% of the vote to Harris’s 46%.

For the Republican Party, Fuller’s win provides a much-needed boost, increasing their narrow majority in the House to 219 members, compared to 214 Democrats.

Special elections, often characterized by lower voter turnout, can be unpredictable, especially in traditionally Republican territories. Notably, Democrats have been outperforming expectations in recent off-cycle elections compared to their results in 2024.

Harris, aged 60, had initially given Democrats hope after emerging as the top candidate in the initial round of voting on March 10, securing 37.3% to Fuller’s 34.9%. This early advantage was largely attributed to a divided Republican field, which diluted the vote.

No one clinched an outright majority, leading to the runoff on Tuesday.

Harris, a cattle farmer, got trounced by Greene in 2024 by some 29 percentage points. The Peach State Democrat largely ran on affordability concerns.

The Georgian had outperformed Fuller on the fundraising circuit, hauling in some $6.5 million relative to the former prosecutor’s $1.2 million.

President Trump endorsed Fuller, 43, on the eve of the election.

“I am asking all Republicans, America First Patriots, and MAGA Warriors, to please GET OUT AND VOTE for a fantastic Candidate, Clay Fuller, who has my Complete and Total Endorsement!” Trump wrote on Truth Social.

He famously had a falling out with Greene last year, slamming her as a “traitor” for criticizing him. The spat culminated in her decision to step down from Congress earlier this year.

Georgia’s 14th Congressional District, which Greene once represented, covers some Atlanta suburbs and encompasses parts of Appalachia near the Tennessee border. The district is seen as 19-points more Republican leaning than the rest of the country, per the Cook Political Report.

Still, Republicans were on guard, keen on avoiding a potential upset at all costs.

The GOP’s grip on the lower chamber had been winnowing over recent months due to resignations, and there are concerns it could slip further. Earlier this year, Rep. Kevin Kiley (R-Calif.) left the GOP but agreed to caucus with Republicans through the end of this session of Congress.

Last month, Trump let slip that Rep. Neal Dunn (R-Fla.) is suffering from a terminal illness. There have also been concerns about how long sexter Rep. Tony Gonzales (R-Texas) will remain in Congress amid the growing scandal that already forced him to drop his reelection bid.

Already, Republican leadership has struggled to win over libertarian-leaning Rep. Thomas Massie’s (R-Ky.) vote on key partisan legislation, allowing little room for error.