Democrats are united in bashing GOP on Obamacare. Medicare for All could reopen a rift.

Progressives are pushing Medicare for All in some of the Democratic Party’s most competitive Senate primaries next year, threatening the unity the party has found on attacking Republicans over expiring Obamacare subsidies.

In Maine, Graham Platner said he’s making Medicare for All a “core part” of his platform in his race against Gov. Janet Mills, the establishment pick who’s called for a universal health care program. In Illinois, Lt. Gov. Juliana Stratton and Rep. Robin Kelly are both championing the concept — and calling out rival Rep. Raja Krishnamoorthi for not fully embracing it.

In Minnesota, Medicare for All has emerged as a key distinction between progressive Lt. Gov. Peggy Flanagan and moderate Rep. Angie Craig, who supports adding a public option to the Affordable Care Act rather than Medicare for All. Flanagan said she “absolutely” expects the policy to define the primary because “it doesn’t matter if I’m in the urban core, the suburbs or greater Minnesota — when I say I’m a supporter of Medicare for All, the room erupts.”

And it’s become a flashpoint in Michigan, where physician Abdul El-Sayed, who wrote a book called Medicare for All: A Citizen’s Guide, is using his signature issue to draw a contrast with Rep. Haley Stevens and state Sen. Mallory McMorrow, who favor other approaches.

Medicare for All — government-funded health coverage for every American — is “where we need to point to,” El-Sayed said in an interview. “And I think you can galvanize a winning coalition around this issue.”

But some more moderate Democrats worry that progressives’ renewed push for Medicare for All would undermine the party’s recent united front in fighting for an extension of the Obamacare subsidies that are set to expire at the end of the year, leading to a significant spike in insurance costs for millions of Americans. Their effort initially failed in the Senate, but with the help of four vulnerable Republicans who crossed party lines this week, Democrats have now secured a House vote on an extension in January.

“We have a singular message, which is: ‘Don’t let these tax credits go.’ We have Republicans on the ropes,” said a national Democratic strategist who works on Senate races and was granted anonymity to speak candidly. “I don’t think introducing ‘we need MFA’ is the right strategy right now. I think it would be unhelpful.”

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