Louisiana’s shift to partisan primaries for the first time since 2010 has introduced ongoing voter confusion that depressed participation in the May and June contests, with overall turnout falling to roughly 17 percent in the Republican and Democratic runoffs. This structural change, combined with a heavily favored matchup between Republican nominee Julia Letlow and Democrat Jamie Davis, leaves traders uncertain whether general-election mobilization on November 3 will rebound to historical Senate levels or remain suppressed. Low-propensity voters who skipped the earlier rounds may stay home in a race viewed as non-competitive, while both parties’ get-out-the-vote operations and any late national developments could still alter participation within the narrow range of recent Louisiana Senate elections. The closely bunched probabilities across turnout bins reflect this balance between institutional friction and standard midterm dynamics.