In the Massachusetts Republican gubernatorial primary set for September 1, 2026, trader consensus shows Michael Minogue holding a slim lead at 46% implied probability over Brian Shortsleeve at 43.5%, with Mike Kennealy trailing at 11.5%, reflecting a fragmented field where candidates must secure 15% delegate support at the imminent state GOP convention for ballot access. Minogue's edge stems from his campaign's early March internal poll by Pulse Decision Science, portraying him as the frontrunner among likely primary voters, while Kennealy's February surveys highlighting general election viability have faded. Recent escalations—a April 1 Shortsleeve attack on Kennealy over Lexington school funding, Kennealy's March 28 WCVB debate challenge, and broad low name recognition—keep the race tight amid calls for consolidation to avoid splitting the conservative vote against Democratic incumbent Maura Healey. Convention outcomes, endorsements, or televised debates could decisively separate contenders.