Georgia’s Republican Senate primary remains tightly contested ahead of the May 19 vote because trader pricing reflects the absence of a clear frontrunner after recent polling shifts and campaign attacks. Mike Collins holds a slim lead in surveys such as the latest Quantus Insights poll, yet Derek Dooley has gained ground following Governor Brian Kemp’s endorsement and strong turnout in South Georgia events. Rep. Buddy Carter’s heavy television advertising and pointed debate exchanges with Collins over ethics allegations have kept the field fragmented, while Dooley’s lower-profile approach has preserved broader appeal among undecided voters. These dynamics, combined with substantial undecided shares typical in low-turnout primaries, sustain the close implied probabilities and leave room for late momentum from endorsements, debate fallout, or turnout patterns to determine the nominee.