Flávio Bolsonaro holds a commanding lead in Mato Grosso polls for the October 4 first round, with recent surveys showing him at 41-47% against Lula’s 26-32% and single-digit shares for rivals such as Ronaldo Caiado or Augusto Cury. The state’s agribusiness economy and conservative voter base delivered Jair Bolsonaro some of his strongest 2022 margins, creating structural advantages for his son and Liberal Party candidate that traders have priced near certainty. National polling remains tighter, yet Mato Grosso-specific data and the absence of major late shifts have reinforced the implied probability. Only an unforeseen regional development, sharp turnout swing, or significant scandal could realistically alter first-place positioning before election day.