Kansas poll puts Hamilton at 50, and our Marshall odds ease to 60 percent

A Wedgewood Polls survey of 500 likely voters in Kansas, fielded September 22-24, has Democrat Adam Hamilton at 50 percent and Republican Sen. Roger Marshall at 48, with 2 percent for other candidates. A two-point difference in a sample that size is small; on this poll alone the race is close.

Our model now gives Hamilton a 40 in 100 chance of winning the seat and Marshall 60 percent. Before this run, at 6:32 PM ET, those numbers were 18 percent and 82 percent. Our mean margin moved from R+5.3 to R+1.5, and the range widened at the Democratic end: our 5th-to-95th percentile span is now R+11.0 to D+8.1, against R+14.8 to D+4.2 previously. That is a larger single-run move than the earlier steps we have logged in this race this month, and it comes from one new poll.

The direction is not new. What changed is the size of the estimated gap. Our model no longer treats a Marshall win as the clearly likelier outcome by a wide margin; it treats the race as near even with Marshall ahead on average. Forty percent is still the minority side of the estimate, and it is a chance, not a call.

Kansas matters to the chamber arithmetic. Our model gives Democrats a 57 percent chance of winning Senate control and puts their mean seat count at 50.8. Democrats need 51 seats for control and Republicans need 50, because the vice president is a Republican and a 50-50 tie goes to the Republicans. With a mean under the Democratic threshold and 40 days to the November 3 election, a seat priced at 40 percent for the Democrat carries weight in that distribution either way it lands.

Our national generic-ballot average stands at D+8.3 across 30 polls over the past 45 days.