PP maintains a commanding lead as the projected top party in Castellón for the November 29, 2026, general election, driven by consistent provincial polling showing it ahead of PSOE and other contenders with roughly one-third of the vote. National momentum favoring the center-right, combined with stable local support and an experienced candidate list headed by Elena Albalat, reinforces trader consensus on its frontrunner status in this five-seat constituency. The D’Hondt allocation and right-wing coordination further solidify the position. Scenarios that could alter the outcome include a late left-wing surge narrowing the gap, unusually high turnout among opposition voters, or shifts in regional alliances that boost PSOE or Compromís-Front Valencià shares beyond current estimates.