The crowded field of 13 registered candidates for Roraima’s two Senate seats on October 4 has kept probabilities for second place tightly clustered near 50 percent across most contenders, reflecting the absence of dominant polling leads or consolidated support after recent party conventions. Incumbency advantages for figures such as Chico Rodrigues, name recognition for Teresa Surita and Bartô Macuxi, and regional or ideological appeals from Pastor Isamar, Nicoletti, and others have produced no clear hierarchy in the plurality block-voting system. Limited recent polling data and high undecided shares further sustain the even odds. Late-campaign developments including new surveys, major endorsements, debates, or shifts in turnout among key voting blocs could quickly reorder the ranking and separate the market probabilities before election day.