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Story summary
- Republicans are defending more vulnerable House seats than Democrats, according to Cook’s October 9, 2026 ratings.
- Cook rated 23 Republican-held Toss Up or worse seats versus 11 Democratic-held seats in 2026.
- Washington’s 3rd District flipped to a Democrat despite a Lean Republican rating, the only Republican-side upset.
- Auto-shop owner Marie Gluesenkamp Perez beat Trump-backed Joe Kent in a Lean Republican open seat by fewer than 3,000 votes.
