The uncompetitive Massachusetts Senate contest, with Democratic incumbent Ed Markey holding a wide lead over Republican John Deaton in polling, continues to shape trader assessments of general-election turnout on November 3. A low-enthusiasm Democratic primary concluded September 1 with Markey prevailing comfortably over Seth Moulton, while the Republican primary drew limited attention, aligning with Secretary of State William Galvin’s assessment that neither contest would generate unusually high participation. Typical midterm drop-off in a safely Democratic state, combined with steady early voting and mail-ballot trends, keeps probabilities clustered around the 2.65M–2.95M ranges. Absent major national developments or campaign events that could mobilize independents or boost turnout among core voters, the market reflects ongoing uncertainty over whether participation will match or fall short of recent midterm benchmarks.