Incumbent Ed Markey’s decisive delegate victory at the Massachusetts Democratic convention in late May, securing roughly 73% support compared to Seth Moulton’s 27%, has reinforced his position as the clear frontrunner ahead of the September 1 primary. Recent polling, including an April UNH survey, shows Markey maintaining a solid lead among Democratic voters, bolstered by endorsements such as Rep. Ayanna Pressley’s and strong union backing. Moulton’s campaign emphasizes generational change and has secured ballot access, yet it has not significantly narrowed the gap in voter surveys. Minor candidates including Alexander Rikleen remain marginal, leaving the race centered on the incumbent’s institutional advantages versus the challenger’s appeal for turnover.