**Incumbent Republican Mike Johnson, the current House Speaker, faces a fragmented field in Louisiana’s November 3, 2026, majority-vote primary for the 4th congressional district.** The race uses the state’s open “jungle primary” system, in which a candidate wins outright by securing more than 50 percent of the vote; otherwise, the top two advance to a December 12 runoff. Johnson captured 85.8 percent in the 2024 contest against a single Republican challenger. Forecasters rate the district Solid or Safe Republican, reflecting its consistent partisan lean and Johnson’s strong incumbency advantages. The opposing slate includes two Democrats and two additional Republicans, none of whom have demonstrated significant fundraising, polling traction, or broad name recognition that would threaten a majority outcome. Recent map adjustments following the Supreme Court’s ruling in *Louisiana v. Callais* primarily affected other districts, leaving LA-04’s underlying Republican tilt intact. With no major late-breaking developments or competitive challengers emerging in the final weeks before the November 3 vote, trader consensus reflects the structural and historical barriers to denying Johnson an outright win in the first round.