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At a glance

Overview

The Democratic Party (DEM) won 237 of the 435 contested House seats in the 1958 cycle, clearing the 218-seat majority line by 19 seats and retaining chamber control despite a net loss of 6 from the prior cycle. The Farmer-Labor Party (FLP) finished at 165 seats (net -11), the Conservative Party (CON) rose to 25 (net +9), and the Moralistic Corporatist Party of the United States (MCPUS) debuted at 8 (net +8), producing a four-party chamber. The headline is a reduced Democratic majority amid a third-party surge that reshaped delegations in industrial and conservative states.

The Map

The gain/loss map colors each of the 48 states by its delegation-controlling plurality party (mode: plurality). The brief supplies no map.flips or map.flipCount object, so no explicit control-change list is provided; however, the swings array records the largest seat shifts. This is a multi-party map: DEM holds plurality in 31 states, FLP in 14, CON in two (VT and NV), and MCPUS in none—though MCPUS holds 8 seats inside Ohio’s FLP 8 – MCPUS 8 – DEM 7 delegation. DEM pluralities range from narrow (CT marginPct 0, NY marginPct 0, RI 0, KY 0, MS 0, ND 0, NE 0, AZ 0, SD 0, UT 0, MT 0, ID 0, NM 0) to commanding (PA marginPct 16, CA 10, TN 7, GA 8). FLP pluralities include OH (marginPct 0, seatSwing 8), IL (3, swing 1), LA (2, swing 4), MD (5, swing 2), WV (6, swing 2), KS (2, swing 3), OR (4, swing 3), CO (2, no swing), MN (1, no swing), DE (1, no swing), NH (2, swing 1), WY (1, no swing). CON pluralities are VT (1, swing 1) and NV (1, swing 1). The largest delegation swing occurred in OH (mag 8: DEM -3, FLP -5, MCPUS +8), followed by PA (mag 5: DEM +5, FLP -5), then MA (mag 4: CON +4), NJ (mag 4: FLP +4), LA (mag 4: FLP +4), CT (mag 3: CON +3), FL (mag 3: DEM +3), GA (mag 3: DEM +3). The map thus shows DEM blue dominant across the South and West, FLP red concentrated in the Midwest and parts of New England, and CON orange as single-seat outliers.

The Balance

The national seat-balance bar charts all four parties: DEM 237 (#3B82F6), FLP 165 (#BF0421), CON 25 (#ff802e), MCPUS 8 (#4f46e5). DEM’s 237 exceeds the 218 majority threshold, granting an outright majority; FLP sits 72 seats behind, CON and MCPUS together total 33. Versus the prior cycle, seat changes were DEM -6, FLP -11, CON +9, MCPUS +8. The bar’s visual shape is a large DEM block, a smaller but substantial FLP block, and two thin bars for CON and MCPUS—confirming a fragmented minority opposite a still-winning majority. No hung or plurality-only chamber exists because DEM passed 218.

Delegations to Watch

The closest-delegations table lists six tied state delegations (seatMargin 0). Connecticut: DEM 3 – CON 3 (total 6, marginPct 0 plurality DEM). New York: DEM 16 – CON 16 – FLP 11 (total 43, marginPct 0 plurality DEM). Rhode Island: DEM 1 – FLP 1 (total 2). Kentucky: DEM 4 – FLP 4 (total 8). Mississippi: DEM 3 – FLP 3 (total 6). North Dakota: DEM 1 – FLP 1 (total 2). Combined, these tied states account for 67 seats (6+43+2+8+6+2). Each shows a perfectly balanced split where no party holds a solo delegation majority; NY’s near-even DEM-CON split with a large FLP third bloc is the most consequential given its size. The table pairs with the map’s plurality shading—CT and NY are colored DEM despite internal ties—illustrating that statewide plurality masked deadlocked local outcomes.

Results by state