Meet the far-left insurgents waging war on the Democratic establishment in 2026 midterms

Theory Briefing

• DSA-backed candidates in Missouri, Michigan, and Wisconsin are running against Democratic incumbents, not Republicans, in 2026 primary races.
• The insurgent strategy bets that pulling the party left wins more than defending the existing establishment coalition.
• Intra-party primary challenges historically force incumbents to spend resources and shift positions before the general election even begins.
• The pattern mirrors past progressive primary waves — some of which flipped seats, others of which cost the party in November.