Robert Charles leads trader consensus in the Maine Republican gubernatorial primary due to his consistent advantages in early polling averages and prior service as a U.S. Assistant Secretary of State, which provide name recognition and organizational strength ahead of the June 9 vote. A recent Maine GOP straw poll showed Ben Midgley narrowly ahead at nearly 32 percent to Charles’s 29.5 percent, though the survey was nonscientific and faced distribution issues. Jonathan Bush and Garrett Mason follow in market pricing, drawing support from business and legislative backgrounds respectively, while the remaining candidates trail amid a fragmented field with sizable undecided voters. These dynamics keep the outcome contested despite Charles’s structural edge.