Full Breakdown
Markey-Moulton Democratic Senate Primary: Polls, Policy, and Endorsements
8/20/2026, 2:27:06 AM
Core Event
Incumbent U.S. Senator Ed Markey (80) and U.S. Representative Seth Moulton (47) are contesting the Massachusetts Democratic primary for the U.S. Senate on September 1. Recent polling consistently shows Markey holding a double-digit lead over Moulton, though the margin varies across surveys. The race has drawn attention for Markey’s progressive health-care platform, Moulton’s emphasis on generational change, and a high-profile endorsement of Moulton by *The Boston Globe* editorial board.
Data & Statistics
- UMass Amherst/WCVB poll – 60 % support Markey, 32 % support Moulton; among independent voters, Moulton leads 53 % to 30 %.
- Suffolk University/Boston Globe poll – Markey 52 % vs. Moulton 38 %; women favor Markey by 27 points; undecided voters down to 9 %.
- Public Policy Polling – Markey 53 % vs. Moulton 22 %.
- University of New Hampshire poll (June 2026) – Markey ahead by 6 points; Emerson College poll (May 2026) – Markey ahead by 5 points.
Background & Context
Markey entered the Senate in 2013 after a nearly four-decade House career and is the dean of Massachusetts’s congressional delegation. He previously defeated Rep. Joe Kennedy III in the 2020 primary. Moulton, a Marine veteran first elected to the House in 2014, launched his Senate bid in October 2025, centering his campaign on “new blood” and age-related concerns. Both candidates cite health-care reform as a priority: Markey backs “Medicare for All,” while Moulton promotes a “universal health-care” model that retains private options.
Official Statements & Responses
Moulton dismissed the latest UMass poll as “not a trusted pollster” and argued the methodology was flawed.
Criticism & Opposition
Some voters, such as Barbara Tadeo, expressed a desire for “new blood” and criticized Markey’s perceived deference to the Trump administration. Markey’s supporters counter that his progressive record, especially on Medicare for All, outweighs age concerns.
Conflicting Reports & Gaps
Polls differ on the exact size of Markey’s lead: the Suffolk/Globe survey shows a 14-point advantage, the UMass/WCVB poll a 28-point advantage, and the Public Policy Polling survey a 31-point advantage. Undecided voter shares range from 9 % (Suffolk/Globe) to 20 % (April 2024 poll). No poll provides a definitive projection of turnout, and early-voting data remain unavailable.
Verbatim Quotes
- “This gives us two, separate statistical tests,” — David Paleologos, director of the Suffolk University Political Research Center
- “It’s very hard to peg what the demographics of turnout are going to be in a primary,” — Steve Koczela, president of the MassINC polling group
- “We’re seeing a lower level of uncertainty in voters, which indicates that they’ve already made their decisions about who they want to represent them,” — Tatishe Nteta, director of the UMass Poll
- “This is not a call for change for change's sake, or an endorsement of youth for the sake of youth alone. Moulton has proven leadership skills that will serve him well if he reaches the Senate, and his positions on major issues have been consistent with the values of most Massachusetts voters and this board.” — Globe Editorial Board
- “It’s about Medicare for All, which Congressman Moulton does not support,” — Ed Markey, U.S. senator
What’s Next
The final televised debate is scheduled for later this month, followed by the start of in-person early voting shortly thereafter. Voters will cast ballots by mail or in person through September 1. The outcome will determine which candidate advances to the November general election in a state that heavily favors Democratic nominees.
