Carol de Toni (PL) holds the clearest lead in trader pricing for first place in Santa Catarina’s October 4 Senate contest, where voters select two senators. Recent polling from late September shows her at or near the top of combined vote intentions, with gains from prior surveys, supported by her established base in the state’s western region, prior record as a top-voted federal deputy, and alignment with the PL ticket backing incumbent Governor Jorginho Mello. Esperidião Amin (PP) and Carlos Bolsonaro (PL) trail closely in most surveys within the margin of error, reflecting competitive name recognition and party dynamics, while the remaining registered candidates register minimal support. The election timeline and undecided voters introduce ongoing uncertainty for final rankings.