DSA 2026: Democratic Socialists Surge Ahead of Midterm Elections

Background: How a 5,000-Member Group Became a 120,000-Member One

The DSA is not a political party. It is a membership organization that endorses candidates who then run on major-party ballot lines — almost always the Democratic one. That structural detail is the source of nearly every conflict described below.

The organization reported passing 120,000 dues-paying members on July 4, 2026, a figure it says makes it the largest socialist organization in American history, surpassing the Socialist Party of America’s 1912 peak of roughly 113,000 under Eugene Debs. National membership stood at about 50,700 in October 2024, the month Zohran Mamdani launched his New York City mayoral campaign. It has more than doubled in the 18 months since. The New York City chapter alone reported more than 15,000 members at the end of June 2026 — more than the entire national organization had a decade ago.

In simple terms: an organization that was a footnote in 2015 is now larger than any socialist group the United States has ever produced, and it grew fastest in the year a DSA member won City Hall in the country’s largest city.

Public identification has moved with it. A CNN poll conducted by SSRS from July 23–27 among 1,225 U.S. adults found that 34 percent of Democrats and Democratic-leaning adults describe themselves as democratic socialists — about 15 percent of all respondents. The survey carried a margin of sampling error of plus or minus 3.2 percentage points.

The Count: House

Tallies differ because organizations count differently. The DSA’s national and local chapters endorse separately, and not every endorsee is a member.

Across all offices — federal, state, and local — the DSA has backed roughly 150 candidates this cycle. As of late June, 35 had advanced from their primaries or run unopposed and 34 had lost, with the balance still pending.

Narrowing to Congress, a candidate tracker maintained by the Washington Examiner counted 29 DSA-backed House candidates as of July 28. Of those:

7 had advanced to the November general election
11 had already lost their primaries
11 were still awaiting primaries yet to be held

The August 4 primaries have since moved that math in both directions. Michigan state Rep. Donavan McKinney, a democratic socialist, defeated Rep. Shri Thanedar in Michigan’s 13th District. In Missouri’s 1st District, former Rep. Cori Bush — also a democratic socialist — lost her rematch against Rep. Wesley Bell, taking 37 percent to Bell’s 59 percent in a contest where AIPAC’s United Democracy Project spent $3.1 million on Bell’s behalf.

The DSA’s marquee general-election nominees are, at present:

Candidate	District	How they got there
Melat Kiros	Colorado’s 1st (Denver)	Defeated 15-term Rep. Diana DeGette by nearly 14 points
Darializa Avila Chevalier	New York’s 13th (Manhattan/Bronx)	Unseated Rep. Adriano Espaillat by 4 points
Claire Valdez	New York (Brooklyn/Queens, open)	Defeated Brooklyn Borough President Antonio Reynoso by 20 points
Chris Rabb	Pennsylvania (Philadelphia, open)	Won a crowded primary to succeed retiring Rep. Dwight Evans
Donavan McKinney	Michigan’s 13th (Detroit)	Unseated Rep. Shri Thanedar

Two currently serving House members are DSA-affiliated: Rep. Alexandria Ocasio-Cortez of New York and Rep. Rashida Tlaib of Michigan. The relationship is not always smooth — national DSA withdrew its endorsement of Ocasio-Cortez in 2024 over her participation in an antisemitism panel, though she remains affiliated with the organization.

Primaries still to come include Wisconsin on August 11, where Eau Claire City Council President Emily Berge is a heavy underdog in the 3rd District, and Florida on August 18, where DSA member Oliver Larkin is challenging centrist Rep. Jared Moskowitz in a seat redrawn this year to favor Republicans. The DSA maintains its own live results tracker for nationally endorsed candidates.

The Count: Senate

The DSA has endorsed no U.S. Senate candidate this cycle. That is the single most overlooked fact in the current coverage.

Two Senate nominees are nonetheless being described as products of the movement:

Michigan — Abdul El-Sayed. The former Wayne County health director defeated Rep. Haley Stevens on August 4 by roughly one percentage point, 48.5 to 47.5, with the Associated Press calling the race the following morning at 99 percent counted. El-Sayed overcame a spending disadvantage of more than eight to one and more than $60 million in outside money, much of it from pro-Israel groups backing Stevens. He is endorsed by Sen. Bernie Sanders and by every member of the House progressive bloc known as the Squad. He is not a DSA member and has said he is neither technically nor practically one. He faces Republican Mike Rogers, whose allies at the Senate Leadership Fund have announced a $45 million investment — the group’s largest ever in Michigan.

Maine — Troy Jackson. The former state Senate president received DSA backing in his earlier run for the Democratic gubernatorial nomination, which he lost. After nominee Graham Platner withdrew in July following a sexual assault allegation he denies, Maine Democrats convened in Bangor on July 25 and gave Jackson 566 of 571 delegate votes. He faces Sen. Susan Collins. The DSA has not endorsed his Senate campaign, and Senate Minority Leader Chuck Schumer and DSCC Chair Kirsten Gillibrand issued a joint statement backing him.

So the honest Senate tally is zero DSA-endorsed nominees and two nominees running on economic-populist platforms that overlap substantially with DSA priorities — a distinction that matters journalistically and, as both parties have made clear, matters not at all politically.

Impact: Is This a Republican Gift?

Start with the structural problem Republicans are trying to solve.

The party holding power loses ground in midterms with near-mechanical reliability. Across the 22 midterm elections from 1934 through 2018, the president’s party lost an average of 28 House seats and four Senate seats. It gained House seats only twice in the modern era — 1934 and 2002 — and both required presidential approval above 60 percent. Gallup’s analysis of the same record found that presidents with job approval below 50 percent saw their party lose an average of 37 House seats, compared with 14 seats for presidents polling above that line. The correlation between presidential approval and midterm House losses runs to .66.

Turnout is the mechanism. Midterm participation runs well below presidential years, and the drop-off is not evenly distributed: the party out of power turns out its base, while the party in power sheds the casual voters who showed up two years earlier. The 2018 midterms drew 49 percent turnout, the highest for a midterm since 1914, and produced a roughly 40-seat Republican loss. The 2022 cycle, at 46 percent, was the second-highest since 1970 and delivered a nine-seat Democratic loss — the smallest for a president’s party in two decades, and a reminder that the models are not destiny.

Republicans in 2026 hold the White House, the House, and the Senate. The lines of accountability are unambiguous and the historical baseline is unfavorable. The DSA’s rise is the most plausible tool the party has found for changing the subject.

The National Republican Congressional Committee circulated a memo laying out a plan to “weaponize” Mamdani as the face of the Democratic Party in battleground House races, and launched digital advertising in nearly 50 competitive districts. The Republican National Committee has specifically targeted El-Sayed in Michigan and Manny Rutinel in Colorado’s 8th District. House Speaker Mike Johnson has framed the midterms in existential terms.

The argument for Republicans: nationalizing an unpopular label is cheaper than defending an unpopular record. The counterargument, made by Democratic strategists including former DCCC chair Steve Israel, is that this playbook has been run before — against Nancy Pelosi, against Eric Adams — and that guilt-by-association ads have a mixed record when local candidates have distinct profiles. Democrats flipped four New York seats in 2024 despite similar messaging.

There is also a turnout argument that cuts the other way. In the CNN survey, 66 percent of registered voters who identify as democratic socialists said they were extremely motivated to vote this year, against 57 percent of other Democratic-aligned voters. Ninety-nine percent said they would back Democratic congressional candidates, compared with 94 percent of non-socialist Democrats. If those numbers hold, the faction Republicans intend to make toxic is also the faction most likely to show up.

Which effect is larger is, at this writing, unknown. It is the central empirical question of the cycle.

Impact: The Disenfranchisement of Moderate Democrats

In a safe Democratic seat, the primary is the election. That single fact is what turns an ideological dispute into a representation problem.

When a DSA-backed challenger wins a primary in a district no Republican can carry, the moderate Democrats who live there are left with three options: vote for a nominee whose platform they oppose, vote for a Republican they have never supported, or stay home. Rabb’s Philadelphia seat has been described as the most Democratic-leaning district in the country. Kiros’s Denver seat was carried by Kamala Harris by a margin the Examiner put at 56 points. In places like that, November is a formality. Voters who returned Diana DeGette to Congress 15 times did not get a competitive general election this year. They got a result.

That is the substance of the disenfranchisement argument, and it is not merely rhetorical. In the seats that are competitive, it carries a measurable cost.

The clearest evidence is Michigan. An EPIC-MRA poll of 600 likely general-election voters, conducted July 24–31 with a margin of error of four points, tested both leading Democratic contenders against Mike Rogers. Haley Stevens led Rogers, 44 percent to 42. Abdul El-Sayed trailed him, 43 percent to 46. Same electorate, same Republican, same week — a swing of roughly five points depending on which Democrat won the nomination. Democratic primary voters then chose the one who tested worse, by a single percentage point.

The aftermath was immediate. The Economist moved its forecast for the seat to favor Rogers following the primary. Rogers has begun openly courting moderate Democrats, publicizing voters who say they will cross over. Jewish Insider reported that Jewish Democrats across the state are weighing whether to back the Republican in November. Michigan’s 2024 Senate race was decided by roughly 19,000 votes.

In simple terms: a faction that cannot win a general election on its own can still determine who appears on the ballot — and in a swing state, the voters it displaces have somewhere else to go.

The institutional response inside the party has been correspondingly sharp. Third Way, the centrist Democratic group, launched a $15 million effort in early August to discredit the DSA, describing it as a mortal danger to Democrats. Former DNC Chair Jaime Harrison posted that people who hate the Democratic Party should not seek its nomination. Democratic strategist Steve Schale told The Hill that the Blue Dog and New Democrat wings are at least as large as the incoming DSA cohort and should say so.

The counterargument is that moderates are still winning where they actually compete. Bell beat Bush by 22 points. Stevens came within one point. Moskowitz is favored in Florida on August 18. And the CNN survey found 64 percent of Democratic-aligned adults who do not identify as democratic socialists would be at least comfortable with their party nominating one — which leaves 36 percent who said they would be upset or uneasy. In a coalition that needs every vote in Michigan, North Carolina, and Georgia, 36 percent is not a rounding error.

Analysis: How Many Actually Win in November?

No non-partisan forecaster publishes a “DSA caucus” projection. Estimating one requires working from the partisanship of the seats involved, and on that basis the picture is clear:

Roughly five DSA-backed House nominees sit in districts safe enough that they are heavy favorites — Kiros, Avila Chevalier, Valdez, Rabb, and McKinney. Added to Ocasio-Cortez and Tlaib, that would put DSA-affiliated House membership at six or seven when the next Congress is seated in January 2027, up from two. NBC News reported in July that the group was on track for at least five.

The remaining DSA-backed House nominees are in seats their party is not expected to win. Hartzell Gray sought the Democratic nomination in a Kansas City–area district Trump carried by nearly 20 points. Berge, if nominated, would face an incumbent in a seat Trump won by more than seven.

In simple terms: the DSA is on track to roughly triple its congressional delegation, and to do so entirely in deep-blue seats. Its expansion into competitive territory has so far failed.

The broader chamber math is a separate question. Decision Desk HQ’s late-July forecast gave Democrats about a 60 percent chance in the House and Republicans about a 57 to 60 percent chance in the Senate, projecting a 225–210 Democratic House and a 50–50 Senate broken by the vice president. A newer model from FiftyPlusOne, released August 3, was more bullish for Democrats: an 85 percent House probability, a 55 percent Senate probability, and a median of 230 House seats. Generic-ballot polling has ranged widely, from a 3.5-point Democratic edge in DDHQ’s average to double-digit leads in individual surveys.

The Senate is where the DSA question becomes consequential rather than symbolic. Michigan and Maine are two of the four or five seats that decide control. In both, the Democratic nominee ran to the left of the party establishment. If Democrats take the Senate anyway, the moderate argument that left-wing nominees forfeit winnable states loses its best evidence. If they fall short in exactly those states, it becomes the party’s organizing narrative for 2028.

Conclusion

The game-changing element of 2026 is not that democratic socialists are winning elections. Ocasio-Cortez and Tlaib have been in Congress since 2019. It is that the movement has achieved sufficient scale — in membership, in self-identification, in primary victories — that it now functions as a parallel party operating inside the Democratic ballot line, with its own endorsement process, its own donor base, and its own leadership openly discussing a 2028 presidential run.

Whether that produces a durable realignment or a backlash depends on results neither faction can control from here. Eighty-five days is enough time for one more round of primaries, roughly $200 million in negative advertising, and no additional clarity whatsoever.

Key Takeaways

The DSA reports more than 120,000 members, up from about 50,700 in October 2024 — the largest socialist organization in U.S. history by its own count.
It has endorsed roughly 150 candidates across all offices this cycle and 29 House candidates, seven of whom had reached the general election as of late July.
It has endorsed zero Senate candidates. Michigan’s Abdul El-Sayed and Maine’s Troy Jackson are movement-aligned but not DSA-endorsed nominees.
About five DSA-backed House nominees are heavy favorites in November, which would raise DSA-affiliated House membership from two to six or seven.
Every DSA general-election favorite is in a safe Democratic seat. The movement has not yet won a competitive district.
The president’s party has lost an average of 28 House seats and four Senate seats across midterms since 1934 — and 37 House seats when presidential approval sits below 50 percent. Republicans hold the White House and both chambers, and the DSA label is their best available tool for changing that subject.
Republicans are advertising on it in nearly 50 competitive districts. Democratic socialists also report the highest turnout motivation of any Democratic subgroup, at 66 percent extremely motivated — the two effects work against each other, and which is larger is unknown.
In Michigan, one poll had Stevens ahead of Rogers by two points and El-Sayed behind him by three — a five-point swing on the nominee alone. Democratic voters picked the weaker general-election test by one point.
Third Way has committed $15 million to opposing the DSA within the Democratic coalition.

Sources

Washington Examiner, “DSA endorsement tracker: The socialists running for office across America,” July 24, 2026 (updated July 28, 2026)
Washington Examiner, “Over 30 socialists have won primaries this year,” June 25, 2026
Washington Examiner, “DSA winning streak faces biggest test in swing states,” July 2026
CNN / SSRS, “A third of Democrats now identify as democratic socialists,” July 30, 2026 (fielded July 23–27; n=1,225; MoE ±3.2)
Newsweek, “9 Hidden Players in the DSA’s Breakout Rise,” July 2026
City & State New York, “DSA’s membership nearly doubled since start of Mamdani campaign,” January 2026
Democratic Left (DSA), “Chapter and Verse: Mensis Mirabilis,” July 6, 2026
DSA National Electoral Commission, 2026 results tracker
NBC News, “Democratic socialists are winning. Their ambitions don’t stop at Capitol Hill,” July 1, 2026
Missouri Independent, “Wesley Bell beats Cori Bush in Democratic primary for St. Louis congressional seat,” August 4, 2026
CNBC / Associated Press, “Abdul El-Sayed wins Michigan Democratic Senate primary,” August 5, 2026
CNN, Michigan and Virginia primary live coverage, August 4–5, 2026
Maine Public / Associated Press, “Troy Jackson wins the Democratic nomination to challenge Sen. Susan Collins,” July 25, 2026
Axios, “Republicans plan to ‘weaponize’ Mamdani in 2026” (NRCC memo)
Fox News, “Democratic group launches $15M war on DSA after socialist primary wins,” August 2026
The Hill, “Democratic Party rattled by DSA midterm primary wins,” July 7, 2026
The Hill, “Democrats favored to win House, underdogs in Senate 100 days out” (Decision Desk HQ forecast), July 2026
The Hill, “Rogers beats El-Sayed, loses to Stevens in Michigan Senate poll” (EPIC-MRA, fielded July 24–31, 2026; n=600; MoE ±4), August 2026
FiftyPlusOne, “Election forecast: Democrats strongly favored to take House, Senate tilts Democratic,” August 3, 2026
American Presidency Project, UC Santa Barbara, midterm seat-loss data, 1934–2018
Gallup, “Midterm Seat Loss Averages 37 for Unpopular Presidents”
Pew Research Center, “Voter turnout in U.S. elections, 2018–2022”
Jewish Insider, “Jewish Democrats in Michigan weigh crossing party lines after El-Sayed’s Senate primary win,” August 2026
RealClearPolling, 2026 Michigan Senate: Rogers vs. El-Sayed polling average