Mike Johnson, the Republican incumbent and Speaker of the House, faces a fragmented field of lesser-known challengers in Louisiana’s 4th congressional district jungle primary, where a candidate must exceed 50% to win outright and avoid a December runoff. The district’s strong Republican tilt, Johnson’s 85.8% performance in the 2024 primary against a fellow Republican, and his recent qualification for the 2026 ballot have reinforced trader expectations of a first-round majority. Multiple Democratic entrants, including a farmer and a college professor, plus one additional Republican, remain low-profile with limited fundraising or polling visibility, reducing the chance of vote splitting that could force a runoff. Safe or solid Republican ratings from forecasting outlets further align with the 88% implied probability reflected in current market pricing.