Republicans' Voter Registration Edge in NJ-7 Shrank for a Fourth Straight Month

Republicans' voter registration edge in NJ-7 shrank again in September: the New Jersey Division of Elections' registration report dated October 1, 2026 counts 218,268 registered Republicans, 212,745 unaffiliated voters and 202,071 Democrats in the 7th Congressional District, a Republican lead of 16,197. That lead was 16,619 in the report dated September 1, 16,973 on August 1, 17,196 on July 1 and 18,950 on primary day, June 2, 2026. Read on October 5, 2026, the state's own tables show four reports in a row in which the gap between the two parties' rolls in the New Jersey House seat with the most money traded on it has narrowed, and it is now 2,753 voters smaller than it was when Rep. Tom Kean Jr. and Rebecca Bennett won their nominations.

The figures come from the Division's Statewide Voter Registration Summary by congressional voting district, a monthly table the state publishes on its election information page, and were reported by the New Jersey Globe. In September alone, Democrats added 384 voters in the 7th, Republicans lost 38 and unaffiliated registration rose by 1,134, for a district roll of 639,566. The seat covers parts of Hunterdon, Morris, Somerset, Sussex, Union and Warren counties, per the Division's amended certification of nominees dated September 4, 2026, which lists Kean, the Republican incumbent, Bennett, the Democrat, and Seamus Patrick O'Toole, running under the slogan Stop Israel's Genocide. This is New Jersey's own count of who can vote in the House race that draws the most trading of any in New Jersey, four weeks before the November 3, 2026 general election.

What the NJ-7 voter registration shift means for the market

Kalshi priced a Democratic winner in the 7th at 89% as of 4:18 pm Eastern on October 5, 2026, with Polymarket at 90%; for a Republican winner, Polymarket had 10% and Kalshi had 12%, on a board that had taken $252K across the two venues. The registration report and the price point the same way, but at very different strengths. A Republican lead of 16,197 over Democrats on a roll of 639,566 is still a Republican lead, and the narrowing since June amounts to fewer than one voter in two hundred. A market that prices the Democrat near nine in ten is plainly not reading the party rolls as the deciding number: it is reading the 212,745 unaffiliated voters, who outnumber the Republican lead thirteen times over, as the people who settle the seat, and treating the registration trend as confirmation rather than cause.

That is the consequence of the October 1 report for anyone following the board: it removes one argument for a Republican hold without adding a new one for a Democratic win. Had the Republican edge widened through the summer, the price would have had to explain why it ignored the rolls. It did not widen. Since July 1, the number of registered Republicans in the 7th has fallen in every monthly report, from 218,371 to 218,268, while Democrats have grown from 201,175 to 202,071.

The Republican side of the board reads the same way from the other direction. Polymarket's 10% for a Republican winner on October 5, 2026 means that venue gives Kean's party about one chance in ten of holding a seat where its registrants still outnumber Democrats by more than 16,000, and Kalshi's 12% the same day is close enough that the two exchanges are telling one story. The registration report gives neither venue a reason to move: it confirms a trend both prices already assume.

Where the NJ-7 rolls changed since the primary

The bigger movement came before the summer. Between the June 2 primary-day count and the July 1 report, Democrats in the 7th went from 198,409 to 201,175 and Republicans from 217,359 to 218,371, while unaffiliated registration fell from 213,288 to 210,235. The report records only the totals, not why each one moved, so the table shows the shift without explaining it: between the primary-day count and the July 1 report, unaffiliated registration in the 7th fell by 3,053 while the two parties together grew by 3,778.

From July onward the movement has been smaller and steadier. Democrats added 180 in July, 332 in August and 384 in September. Republicans lost 43, 22 and 38. Unaffiliated voters, after the June drop, added 802, 574 and 1,134. The unaffiliated column is the one growing fastest, and it is the column that neither party can claim in advance.

Measured from primary day, the shift in the 7th stands out across the state. Between the June 2 count and the October 1 count, the Democratic margin over Republicans moved toward Democrats in eleven of the twelve districts, and only the 4th moved the other way. The largest net move was in the 12th, where Democrats gained 5,698 voters on Republicans; the 7th was second, at 2,753, ahead of the 8th at 1,990 and the 6th at 1,832. Statewide over the same four months, Democrats added 28,905 registrants and Republicans 8,192. The 7th is therefore not an outlier in direction; it is an outlier in where it sits. It is one of only two districts where the margin being cut is a Republican one, and the 2nd, the other, still has a Republican lead of 23,699 over Democrats against the 7th's 16,197.

How NJ-7 compares with the rest of New Jersey

Statewide, the October 1 report counts 6,725,177 registered voters, up 15,706 in a month. Democrats gained 2,745 and Republicans 141, and unaffiliated voters accounted for 12,571 of the increase, leaving Democrats with a statewide registration advantage of 885,640. Republicans lost registered voters in five of the twelve congressional districts in September: the 1st, 6th, 7th, 10th and 11th.

Only three of New Jersey's twelve districts have more registered Republicans than Democrats. In the 4th, the Republican lead widened slightly in September, to 101,812. In the 2nd, it narrowed to 23,699 from 23,823. The 7th is the closest of the three by a wide margin, and the only one where the two parties are within 20,000 of each other while unaffiliated voters nearly match the larger party. The NJ-2 market page and the elections hub carry the boards for the other districts.

What the registration report cannot tell the market

A registration table counts names on a roll. It says nothing about who will vote, and nothing about how unaffiliated voters will split. The strongest reason not to read too much into the October 1 report is the size of what it leaves out: the Republican lead over Democrats in the 7th is still 16,197 voters, and the change since the primary is 2,753 voters across a district roll of more than 639,000. A reader who thinks the board has run ahead of the district will point out that the rolls still favour Kean's party, and the report gives that reader nothing to retract. The NJ-7 analysis from September 28 sets the price against the polls and the ratings; the registration trend is a separate piece of evidence and it points the same way, only more weakly.

What comes next in NJ-7

The next dated beats are on the Division's own calendar. October 13, 2026 is the voter registration deadline for the November general election, so the rolls that decide the 7th are close to final. In-person early voting runs from October 24 to November 1, 2026, and the general election is on November 3. If the Division keeps its monthly pattern, its next table will be dated November 1, the last count before the polls open, and its page already lists a 2026 General Election Day registration table to follow. The NJ-7 market page carries the live board for the seat.