Voting began this week for a statewide special election that would drastically alter California’s congressional map. Proposition 50, or Prop 50, could add as many as five Democrat-held seats in Congress in time for the 2026 midterms. Voting began this week for a statewide special election that would drastically alter California’s congressional map. Proposition 50, or Prop 50, could add as many as five Democrat-held seats in Congress in time for the 2026 midterms.