Louisiana’s 1st Congressional District’s strong Republican lean, reflected in its R+20 Partisan Voter Index and Donald Trump’s 25-point margin there in 2024, anchors trader expectations for a Republican win. Incumbent Steve Scalise, the House Majority Leader seeking a tenth term, benefits from substantial fundraising advantages and endorsements amid a jungle primary on November 3 that includes Democrat Lauren Jewett and two minor Republican challengers. Mid-decade redistricting after a Supreme Court ruling further reinforced the district’s partisan balance. All major forecasters rate the seat solid or safe Republican. Only an unforeseen late development, such as a major scandal or health event affecting Scalise, would realistically shift the outcome before the December 12 runoff if needed.