Congress Balance of Power 2026 is the combined-control market: one contract on which party holds the Senate and the House together after the November 3, 2026 midterms. Rather than three broad buckets, it prices all four Senate-by-House combinations plus an Other outcome, so a split Congress is its own line instead of a catch-all. Roughly $15.9M in cumulative volume trades across Kalshi and Polymarket, and the live board above ranks the current cross-platform price on each of the five paths.
Congress Balance of Power 2026 is the single market that prices the whole legislature at once. Instead of trading the House and the Senate separately, it asks one question: which two-chamber outcome lands after the November 3, 2026 midterms? The board prices every combination the two races can produce, all four Senate-by-House pairings plus an Other line, which is why it reads as a five-outcome market rather than a simple three-way call. Roughly $15.9M in cumulative volume trades across Kalshi and Polymarket, making it one of the most-traded down-ballot markets of the cycle. The live board above ranks the current price on each path.
The combined-control market sits one level above the two chamber markets it summarizes. The House puts all 435 seats on the ballot every two years, and 218 is the number that decides the majority. The Senate stages roughly a third of its 100 seats each cycle, with 51 seats, or 50 plus the vice president, controlling the floor. Congress Balance of Power 2026 takes the result of both races and resolves to one of five combined lines.
That structure is why traders watch it alongside, not instead of, the two separate chamber markets. Those price each race in isolation. This one prices the correlation between them, and it does so explicitly: every way the Senate and House can pair off is its own contract. When one party is favored to sweep, its unified line carries most of the probability; when the races are expected to diverge, one of the two split lines gains.
Five lines split the entire board, one for each way the two chambers can break plus a residual. Democratic Senate, Democratic House: a Democratic sweep of both chambers, unified control of the legislative branch. This is one of the two lines sitting nearly level at the top of the board.
Republican Senate, Democratic House: a split Congress with Republicans holding the Senate and Democrats taking the House. This is the market's other co-leader, priced almost dead even with a Democratic sweep, and it reflects the read that the two chambers break in opposite directions.
Republican Senate, Republican House: a Republican sweep, the mirror of the Democratic unified line. Its price tracks the party's ability to defend both majorities against the midterm headwind that historically works against the party holding the White House.
Democratic Senate, Republican House: the reverse split, Democrats winning the Senate while Republicans hold the House. It is the least likely of the four combinations on the board and trades well below the two co-leaders.
Other: any result that falls outside those four cleanly defined pairings. Because the four combinations already cover every ordinary Senate-and-House outcome, the Other line stays close to zero and functions as the settlement backstop rather than a real contender.
The market resolves on the results of the November 3, 2026 midterm elections, once control of both chambers is determined. Control is set by the seats each party wins, with the new Congress organizing when it convenes in January 2027. Each of the four combination contracts resolves Yes only if its exact Senate-and-House pairing occurs, and the Other contract resolves Yes if the result falls outside those four pairings. Recounts or runoffs that delay a final call push settlement to the certified result.
The combined board is best read next to its two components. The U.S. House control odds and the U.S. Senate control odds price each chamber on its own, while this market prices every pairing of the two together. For the wider slate of election, approval, and policy contracts, browse the politics prediction markets or the full prediction market board.
Congress Balance of Power 2026 resolves on the results of the November 3, 2026 midterm elections, once control of both chambers is settled by the seats each party wins. The market lists four combination contracts, one for each pairing of Senate control and House control, plus an Other contract. A combination contract pays out only if its exact outcome occurs; for example, the Democratic-Senate and Democratic-House contract settles Yes only if Democrats secure both the 218-seat House majority and a 51-seat Senate majority, counting the vice president's tiebreak for a 50-seat Senate. The Other contract pays out if the result falls outside those four defined pairings. Control reflects how the new Congress organizes when it convenes in January 2027; recounts, runoffs, or contested seats that delay a final call push settlement to the certified result.
As of early July 2026, the board's two co-leaders are a Democratic sweep of both chambers near 41c and a split Congress with a Republican Senate and Democratic House near 41c, with a Republican sweep the third path near 17c. The market prices four Senate-by-House combinations plus Other across Kalshi and Polymarket, on roughly $15.9M in cumulative volume. The live board above shows the current price on each line.
It resolves on the results of the November 3, 2026 midterm elections, once control of both chambers is determined. Each combination contract settles Yes only if its exact Senate-and-House pairing occurs, and recounts or runoffs that delay a final call push settlement to the certified result when the new Congress convenes in January 2027.
The combined-control question trades on both Kalshi and Polymarket, the two platforms aggregated on the board above. Comparing the two is useful because the spread between them on the same combination flags where traders disagree on the paired result.
It lists all four combinations of Senate and House control: a Democratic sweep, a Republican sweep, a Republican Senate with a Democratic House, and a Democratic Senate with a Republican House, plus an Other line for anything outside those four. Split control is priced as its own explicit outcome rather than folded into Other.
Track the generic congressional ballot, the roughly 33-34 Senate seats up in 2026, and presidential approval as the midterm drag on the party in power. Watch the separate House and Senate control markets, since a divergence between them feeds the two split-control lines.