Raymond McKay dominates the Rhode Island Republican US Senate primary market at 83.5% implied probability as the state party-endorsed candidate with superior fundraising—recent FEC reports show him raising over $150,000 versus Allen Waters' under $20,000—and established name recognition from prior campaigns. Waters trails at 11.7%, buoyed by limited grassroots backing but lacking institutional support. No major developments have emerged in the past week ahead of the September 10 primary, where low GOP turnout historically favors frontrunners like McKay; traders price in minimal upset risk absent late endorsements or scandals. Polling averages, though sparse, align with this consensus in the deep-blue state's low-profile primary.