**Incumbent Republican Speaker Mike Johnson faces limited opposition in Louisiana’s 4th congressional district, where voters use the state’s majority-vote system on November 3, 2026.** All candidates appear on one ballot; a candidate needs over 50% to win outright and avoid a December 12 runoff. Johnson, who won reelection in 2024 with 85.8% against a single Republican challenger, holds a decisive edge in this solidly Republican district encompassing northwest Louisiana. He has raised over $17 million, secured endorsements including from President Trump and AIPAC, and faces only modest challengers: Republicans Gordon Heslop and Mike Nichols plus Democrats Conrad Cable and Matt Gromlich, who have raised far less. Trader consensus at 95.5% for an outright winner reflects Johnson’s incumbency, fundraising dominance, name recognition, and the district’s partisan composition, which historically favors strong Republican performance. Minor Republican challengers are unlikely to meaningfully split the vote, while Democratic candidates lack the resources or polling visibility to reach a majority or force a runoff. Realistic scenarios that could still alter the outcome include a major late-breaking scandal, significant health event, or unprecedented turnout surge among Democratic or unaffiliated voters that consolidates behind one opponent. Absent such developments, Johnson’s structural advantages make an outright first-round victory the dominant expectation reflected in current pricing.