Incumbent Rep. Stephen Lynch holds a narrow trader consensus lead at 50% implied probability for the Massachusetts 8th District Democratic primary on September 1, buoyed by his long tenure, superior cash on hand exceeding $1.1 million as of late March, and a 62%-36% lead over challenger Patrick Roath in a February Workbench Strategies poll of likely voters. Roath's 40% pricing reflects momentum from recent progressive endorsements, including College Democrats of Massachusetts in early April and True North Action Alliance Boston, plus stronger recent fundraising receipts near $889,000. Andrew Zylberfink trails at 37% amid reports of his withdrawal, underscoring uncertainty in this closely contested intraparty race testing moderate incumbency against progressive challengers ahead of the May 30 state Democratic convention.