New Ad Calls Out Seth Moulton’s Chameleon-Like Shifting Pattern of Support for Progressive Policies

May 13, 2026 — Commonwealth Together PAC today released a new ad that highlights Senate candidate Seth Moulton’s shifting pattern of support for progressive policies.

Titled ‘Chameleon,’ the ad features imagery of a chameleon changing colors, and highlights how Seth Moulton opposed or criticized key progressive policies during his 2019 presidential campaign.

Moulton opposed Medicare for All and has criticized single-payer healthcare as a “socialized government system” that would be “too far left.” A majority of Democrats in Congress support Medicare for All — but not Seth Moulton.
Moulton initially co-sponsored the Green New Deal, but within months he began criticizing it, calling the legislation “a bunch of socialist programs” and saying “I think that this is another place where the Democratic Party is starting to go astray.”
After Senator Warren proposed an ‘Ultra-Millionaire tax’ on the country’s wealthiest 75,000 households, Moulton said Warren wanted to "punish the rich" and that the proposal was “un-American.”

“When he ran for President, Seth Moulton stood with Republicans in opposing Medicare for All, undercutting the Green New Deal, and trashing Sen. Warren’s billionaire tax. He built his career with close ties to private equity, and spent years badmouthing progressive policies,” said George Bachrach, former president of the Environmental League of Massachusetts and senior advisor to the Commonwealth Together PAC backed by unions and environmental leaders. “Now Moulton’s trying to pose as a progressive after trashing progressive policies. And he’s taking millions of dollars in dark money from anonymous donors, hiding the supporters behind his attempt to unseat progressive champion Ed Markey.”

“Which Seth Moulton would we see in the Senate?” Bachrach asked. “This race comes down to a question of trust. And we just can’t trust Seth Moulton to do what’s best for Massachusetts. Only what he thinks is best for the next step in his political career.”

The ad, backed by a six-figure media buy, will air on digital channels, connected television, and social media platforms. It’s the second ad in an ongoing multi-million-dollar ad campaign by the Commonwealth Together PAC, which was organized earlier this year to support Senator Ed Markey’s reelection and oppose Seth Moulton’s candidacy.

The PAC is backed by major labor unions including 1199SEIU United Healthcare Workers East and the Massachusetts Teachers Association, as well as local environmental leaders and other supporters of Senator Markey’s leadership in the U.S. Senate.

The Commonwealth Together PAC has filed FEC disclosures showing all money raised and spent. That’s a major contrast to MA Progress Action, the pro-Moulton dark money group that, despite its blatant electioneering, isn't revealing any information about its donors or spending. That means voters don't know how much Seth Moulton's private equity backers are pouring into this race, or who exactly is spending potentially millions of dollars to elect him.

Last month, the Campaign Legal Center, the DC-based nonpartisan voting rights & election integrity group, filed an FEC complaint alleging that MA Progress Action is violating federal independent-expenditure reporting requirements and campaign finance laws with its new political ad attacking Sen. Ed Markey.

The new Commonwealth Together PAC ad can be viewed at https://www.youtube.com/watch?v=cDPzFbY6WmI

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The Commonwealth Together PAC was formed by unions representing more than a quarter million Massachusetts workers, along with environmental and progressive leaders across the state, to support Ed Markey's reelection and ensure that Massachusetts voters understand the clear choice they face this September.