Incumbent Sen. Sherrod Brown commands 96% trader consensus as Ohio Democratic Senate primary winner after securing a landslide victory on March 19, with over 99% of the vote amid token opposition from Rep. Allison Russo, Rep. Greg Landsman, and former Rep. Tim Ryan. Brown's three-term incumbency, cross-partisan appeal in a battleground state, and absence of serious challengers—bolstered by strong fundraising and polling dominance—drove his commanding position, reflecting the wisdom of crowds in prediction markets. Final certification by state officials is pending, but historical base rates show negligible primary losses for unthreatened incumbents without scandals or legal disputes. Realistic challenges would require unprecedented irregularities triggering recounts or court interventions, though none have emerged.