The Democratic coalition heading into the 2026 midterms is unusually broad, and that diversity could help the party pick up dozens of seats and potentially reclaim one or both chambers. One striking element of this coalition is a cluster of progressive newcomers aligned with the Democratic Socialists of America (DSA). The organization helped elect New York City Mayor Zohran Mamdani in 2025 and counts high-profile allies such as Rep. Alexandria Ocasio-Cortez and Sen. Bernie Sanders.
Why Small Factions Matter
Several DSA-affiliated candidates won Democratic primaries in 2026—mostly in districts that favor Democrats—meaning at least half a dozen are all but guaranteed seats in the next Congress. While that number is small, history shows that small, cohesive groups can exert outsized influence when margins are tight or procedural levers are available. The 118th Congress offers a clear example: Kevin McCarthy required 15 rounds of balloting to secure the speakership because a relatively small bloc of hard-right Republicans withheld support.
The Speaker's Power and the Public Vote
Choosing the House speaker is a public, on-the-record vote of the full chamber. Because the speaker controls which bills reach the floor, committee assignments, and major staff and messaging resources, an organized faction can leverage a few votes to shape leadership choices and legislative priorities. Democrats currently expect Rep. Hakeem Jeffries to be their speaker if they win the House, but a narrow majority or internal dissent could expose leaders to pressure or rebellion.
Balancing Leadership and Governing
Speakers face a dual role: they are both institutional leaders of the chamber and partisan leaders of their caucus. That tension can force difficult trade-offs. McCarthy’s experience—winning concessions to secure votes and later being removed after fractious negotiations—illustrates how intraparty deals and defections can destabilize leadership. His successor, Speaker Mike Johnson, has shown that aligning firmly with an ideological wing can be an alternative strategy, but it carries its own costs for legislative productivity and coalition-building.
What Gives a Faction Influence?
Two key factors determine whether a faction like the DSA can shape outcomes: the size of the majority and the faction’s organization and cohesion. Narrow majorities require leaders to court every member; large majorities can absorb dissenting votes without conceding policy ground. Some forecasting models suggest Democrats could win House margins of roughly 30 seats in 2026—an outcome that would reduce the strategic leverage of a half-dozen DSA members.
If the Democrats win a House majority in the midterms, how will Democratic leaders handle DSA-affiliated House members?wildpixel/iStock via Getty Images Plus
Organization matters too. To influence lawmaking, a faction must be unified on policy goals and willing to act as a voting bloc. The conservative Freedom Caucus demonstrates how a modestly sized, disciplined group can drive major outcomes by coordinating strategy and procedural moves. Conversely, disorganized insurgents often find party leaders’ institutional tools—committee assignments, scheduling control, and staff resources—overwhelming.
Practical Constraints on Newcomers
Many DSA-affiliated lawmakers are political newcomers or candidates who prevailed outside the traditional party structure. That outsider profile can be an asset in primaries, but in Congress it often comes with disadvantages: limited legislative experience, smaller or less-experienced staffs, and unfamiliarity with procedural norms. Political science research since the 1970s shows that individual members’ capacity to advance bills has declined relative to party leaders, making it harder for new members to unilaterally drive major legislation.
That said, DSA members could expand their influence by building alliances with other establishment-skeptical newcomers or with experienced progressives—figures such as Reps. Ayanna Pressley or Maxwell Frost—who share policy priorities even without formal DSA ties.
Bipartisanship Remains A Path Forward
Ideology is not the only route to policy success. Recent bipartisan achievements—the CHIPS and Science Act, the First Step Act, and housing legislation like the 21st Century Road to Housing Act—underscore that cross-party deals can still produce major outcomes. Research shows members who attract bipartisan co-sponsors are often more effective legislators, suggesting that pragmatic coalition-building can outmaneuver pure insurgency.
What To Watch
In the next Congress, the DSA’s impact will hinge on three variables: the size of Democratic majorities, the DSA-affiliated members’ cohesion and strategy, and their ability to navigate Congress’s institutional constraints. Party leaders will need to weigh insurgent demands against the responsibility to govern, while insurgents must decide whether to maximize leverage through rebellion or pursue influence via alliances and bipartisan trade-offs.
Bottom line: Small factions can disrupt or shape congressional agendas, but their success depends less on rhetoric than on margins, organization, experience, and the hard realities of institutional power.
