Polymarket
KalshiThe 3rd Is Priced as a Hold Because Burlington County Has Out-Voted Monmouth in a Midterm and a Presidential Year Alike
The New Jersey 3rd District odds rest on Burlington County. Herb Conaway won this open seat on November 5, 2024 by 32,580 votes out of 379,484, and more than the whole of that margin came from the Burlington portion, where he led 120,027 to 83,808, while the Monmouth County portion went to Republican Rajesh Mohan by 17,486 and the Mercer portion leaned to Conaway by 13,847. The market prices his first re-election as a Democratic hold because it treats the Burlington margin as a fixed feature of the map rather than a result the Republican nominee, Michael P. McGuire of Freehold, can campaign down. That is the read. The live board above carries the current price, and the rest of this page is the case for it and the case against it.
What the 3rd District Odds Rest On
The price rests on how the three county portions have behaved across two very different elections. In the November 8, 2022 midterm, Andy Kim held the seat 150,498 to 118,415 over Bob Healey, an 11.8-point margin on 271,376 votes; Burlington gave him a 28,614-vote edge while Monmouth went Republican by 8,171. In 2024, on a presidential-year turnout of 379,484, Burlington's Democratic margin widened to 36,219 and Monmouth's Republican margin more than doubled to 17,486. Mercer's portion moved from 11,640 to 13,847 for the Democrat. The district-wide margin narrowed from 11.8 points to 8.6 because Monmouth grew faster than Burlington, not because Burlington moved.
That is the structure the market is pricing. Burlington's two-party vote in 2024 was 203,835 against Monmouth's 88,376, so the Republican county would have to swing far more than it has for the seat to turn, while the Democratic county has produced a five-figure margin in a midterm and a presidential year alike. What the market treats as settled is not Conaway, who has been in Congress only since January 3, 2025, but the arithmetic of a district in which the largest county is the Democratic one.
The June 2, 2026 primary added a reading on the Republican side. Conaway was unopposed and drew 50,437 Democratic votes, 31,953 of them in Burlington. Three Republicans split 25,567: McGuire took 14,810, running under the slogan Send a Marine to Congress in Burlington and on the Mercer and Monmouth county organizations' lines, against 6,238 for Jason Cullen and 4,519 for Justin Barbera. McGuire won every county, but the Republican primary electorate was half the size of the Democratic one in a district whose general electorate has been within nine points, which is the pattern of a party that turns out in November and not in June.
The 3rd District Ballot
Four lines appear on the general election list the Division of Elections issued on September 4, 2026. Herb Conaway, of Willingboro, carries the incumbent's asterisk; he served in the General Assembly for the 7th Legislative District from January 1998 until January 2025 before winning the House seat, and his committee's most recent statement of candidacy on file with the Federal Election Commission is dated December 4, 2024. Michael P. McGuire, of Freehold, filed his federal statement of candidacy on December 20, 2025.
Ryan Michael Kelly of Hightstown runs under the slogan Affordability, Accountability, People and filed federally as an independent on January 28, 2026. Steven Welzer of Princeton holds the Green Party line, as he did in 2024, when he drew 3,478 votes. Kalshi writes a contract on each major party and nothing else; Polymarket lists a market on another party winning, and that market had no volume as of October 5, 2026, so the two minor lines matter to the price only as votes that leave one of the two columns the venues actually trade.
What the 3rd District Money Says
As of October 5, 2026, the two venues had matched $46.1K on this market, and the split is the unusual part: $26.6K sat on the Republican contract against $19.5K on the Democratic one, the only one of the four district boards linked below where the Republican side carries more matched money than the Democratic side. That is consistent with traders expressing a view on a seat priced above 90% through the lower-priced contract, in either direction, and it says nothing by itself about who wins.
The venues have closed the gap between them. On September 28, 2026 Kalshi's Democratic quote sat three points above Polymarket's, the widest split on the four New Jersey district boards on this site; by October 5, 2026 Kalshi and Polymarket both had the Democratic Party at 98%, and the cheapest Yes on the Republican side was Polymarket's, at 1%. Kalshi's contracts under the KXHOUSERACE-NJ03-26 event opened on January 7, 2026, and Polymarket's event was created three weeks later, on January 28; Polymarket showed $40.4K of volume and $37.8K of posted liquidity on the October date. The gap closed from Polymarket's side, in a week with no poll of the district on Ballotpedia's page and no change from the four rating outlets, which last moved on September 1. The book that had seen more risk in Monmouth stopped pricing it, and the market's confidence in the 3rd now reads the same wherever you look.
The Case Against the 3rd District Read
The strongest case against the read is that the market has priced a level and ignored a direction. The Democratic margin fell from 11.8 points in 2022 to 8.6 in 2024, and the loss came from the county the Republican nominee lives in: Monmouth's Republican margin went from 8,171 to 17,486, and McGuire now carries his home county organization's endorsement. A reader who holds the other view would say that a three-point move in one cycle, in a race with no incumbency on the ballot, is exactly the kind of trend a cheapest Democratic Yes of 98% on October 5, 2026 should not be ignoring, and that Conaway has never once defended the seat in a midterm.
There is a second objection in the calendar. The 2022 margin was set with the sitting incumbent on the ballot and the 2024 margin with a presidential race driving turnout to 379,484; a 2026 midterm with a first-term member and only the Senate race above him on the ballot is a third electorate that neither prior result describes. By October 5, 2026 both books had the Democratic Party at 98%, which leaves almost no room for that uncertainty; the three points that separated them a week earlier were the last sign of the market arguing with itself.
What Changes the 3rd District Read
The read is wrong if a named public poll puts the 3rd inside five points before November 3, 2026, or if McGuire's October report shows him ahead of a sitting member on receipts. The dates that can produce either are fixed by statute and by the Federal Election Commission.
• September 30, 2026: books closed on the October quarterly reporting period, the last full quarter before the vote; the totals stay private until the report is filed.
• October 13, 2026: the registration deadline; the registration statistics the Division of Elections publishes after it are the first hard count of the electorate that decides between Burlington and Monmouth.
• October 15, 2026: the October quarterly report is due at the Federal Election Commission, the first side-by-side reading of the two campaigns' receipts since the primary.
• October 22, 2026: the pre-general report, covering October 1 through 14, shows whether either campaign is spending a closing budget in the district.
• October 24 to November 1, 2026: the early voting period, with mail-in ballots in circulation since September 19.
• November 3, 2026: election day, polls open 6 a.m. to 8 p.m.
When the 3rd District Market Resolves
Resolution runs on two clocks. Kalshi's KXHOUSERACE-NJ03-26 contracts settle on who is sworn in: the Democratic contract pays if the House member sworn in for NJ-03 for the term beginning in 2027 belongs to the Democratic Party, the Republican contract if that member is a Republican, and either can be determined early once a consensus of media organizations has projected the winner. Polymarket's NJ-03 House Election Winner market settles on the party of the candidate who wins on November 3, 2026, as established by a consensus of credible reporting, falling back to the Federal Election Commission's official results if reporting is ambiguous, with a candidate lacking a major-party ballot line assigned to the party they most recently said they would caucus with.
The state calendar behind those clocks: postmarked mail ballots are received through November 9, county boards of canvassers meet at noon on November 18, recount applications close on November 21, county clerks transmit results to the Secretary of State by November 23, and the Board of State Canvassers certifies on or before December 3, 2026. The Twentieth Amendment starts the new term at noon on January 3, 2027, which is the day Kalshi's question is finally answered; Polymarket's is answered by the certified count. Only a winner who is not seated would separate the two.
Related New Jersey House Markets
The 9th District is the seat with the closest 2024 result and the most matched money of the four written up here; the 12th District is the open seat where a thirteen-way primary picked the nominee; the 5th District is Bergen County's race the way this one is Burlington's. The politics desk carries every New Jersey contract with a page, the elections ballot puts the House races beside the Senate contest, and the markets index lists everything the site follows.