Republicans currently hold a narrow 218-212 House majority with four vacancies as of mid-August 2026, following multiple special elections and departures in predominantly safe districts for the incumbent party. Recent vacancies, including those created by deaths and resignations in California, Georgia, Florida, and Texas, have produced or are scheduled to produce outcomes that preserve the existing balance rather than erode it. Historical precedent shows chamber control flipping between elections is rare, with the most recent instances occurring decades ago and typically requiring clustered vacancies in competitive seats. Traders assign 97% probability to Republicans retaining the majority through the November midterms because the current margin and special election calendar present few realistic pathways for Democrats to secure the net gains needed before voters decide the full chamber. Late developments such as additional unexpected vacancies or shifts in special election timing remain the primary variables that could alter the consensus.