GOP Majority Faces Tighter Margins Following Greene Resignation

Rep. Marjorie Taylor Greene’s upcoming resignation has set the stage for a critical reshuffling of power in the narrowly divided House of Representatives, potentially threatening Republican control in the coming months.

The current House composition stands at 219 Republicans to 213 Democrats, with three vacant seats. This slim six-seat margin means Republicans can only afford to lose two votes on the floor to pass legislation without Democratic support. However, with Greene’s announced January 5th departure, the GOP’s precarious majority faces even greater challenges ahead.

The mathematical equation governing House control is about to become significantly more complex, with several special elections on the horizon that could dramatically alter the balance of power.

On December 2, voters in Tennessee will decide who replaces former Republican Rep. Mark Green, who retired earlier this year. Republican Matt Van Epps faces Democrat Aftyn Behn in this contest. While the district has traditionally leaned heavily Republican—former President Trump carried it by 22 points in the last election—Democrats are investing substantial resources in hopes of an upset.

Special elections often produce unexpected results when traditional voting patterns are disrupted by lower turnout or shifting political winds. In 2017, Democrats mounted strong challenges in four special elections for seats vacated by Republicans who joined the Trump administration. Though Republicans ultimately held all four districts, their margins were surprisingly thin—winning by just 3 to 6 percentage points in what had been considered safe seats. These competitive performances foreshadowed Democrats’ successful 2018 midterm campaign, when they flipped 40 seats and reclaimed House control.

If Republicans retain the Tennessee seat in December, they’ll maintain a 220-213 majority until Greene departs in January, after which it would shrink to 219-213. But a Democratic upset would immediately reduce the GOP advantage to 219-214, leaving virtually no room for dissent within Republican ranks.

Additional special elections will follow in early 2025. A January 31 runoff in Texas will fill the seat of the late Democratic Rep. Sylvester Turner, with Democrats expected to maintain that position. Another special election in March will determine Greene’s successor in Georgia, and while Republicans are favored, Democrats will certainly make a strong push in that race.

The final scheduled special election comes in April to replace former Democratic Rep. Mikie Sherrill of New Jersey, who resigned after winning her state’s gubernatorial race. Democrats are expected to hold this seat, which would bring the House to full strength with a projected 220-215 Republican majority—assuming both parties secure their anticipated victories.

However, if Democrats were to outperform expectations and flip either the Tennessee or Georgia seats while holding their expected positions in Texas and New Jersey, Republicans could see their majority shrink to just 218-217—a single-vote margin that would make governing extraordinarily difficult.

Speaker Mike Johnson faces additional complications as government funding expires on January 30, just one day before the Texas special election runoff. This timing could potentially impact when new members are sworn in, as the Speaker has discretion over this process.

Adding further uncertainty to this delicate balance is the possibility of additional departures due to retirement, resignation, or death. The House has experienced several unexpected vacancies this year, with freshman Rep. Turner passing away just two months after taking office, and long-serving members like Reps. Raúl Grijalva, Gerry Connolly, and Donald Payne Jr. all dying while in office.

While the Senate majority has shifted mid-Congress on several occasions throughout history, the House has never experienced a party change in control during a congressional session. Given the current razor-thin margins, however, such an unprecedented event now appears within the realm of possibility.

The precarious Republican grip on House control—among the narrowest majorities in American history—remains the dominant storyline of the 119th Congress, with each resignation, special election and floor vote taking on outsized importance in determining which party wields the gavel.