John E. Sununu holds a commanding lead in the New Hampshire Republican Senate primary due to his prior service representing the state in the chamber, extensive name recognition, and consistent polling advantages exceeding 35 points over Scott Brown in recent surveys from the University of New Hampshire and others. Sununu’s fundraising edge, emphasis on fiscal discipline and civility, and reported support from key figures have reinforced trader expectations ahead of the September 8 vote. Brown, a former Massachusetts senator and ambassador who previously sought the seat, trails on similar metrics despite highlighting border security and independence in debates. Minor candidates like Dan Innis and Chris Sununu register negligible support. A late surge by Brown or major unforeseen developments, such as a shift in endorsements or voter turnout patterns, would be required to meaningfully alter the current market pricing.