Ohio poll has Brown at 48 and Husted at 45; our estimate moves to 74 in 100

A YouGov poll sponsored by Bowling Green State University, fielded September 1-10 among 1,000 likely voters, put Sherrod Brown at 48 percent and Republican incumbent Jon Husted at 45 percent in Ohio's Senate special election. Three percent picked an independent candidate and 2 percent named someone else. A three-point gap on a sample that size is a close race, not a settled one.

Our model now gives Brown a 74 in 100 chance of winning the seat, with a mean margin of D+3.8 and a 5th-to-95th percentile range running from R+6.1 to D+13.6. The run immediately before this one, at 8:32 AM ET today, had Brown at 57 percent with a mean margin of D+1.1 and a range from R+8.7 to D+10.9. The YouGov result is the new information between those two runs.

So this is a change, not a confirmation, though it is a change in degree. The direction of the estimate is the same as it has been through the late-summer polling: Brown modestly ahead, with enough uncertainty left in the distribution that a Husted win of several points remains inside our middle 90 percent of outcomes. What moved was the size of the expected margin and, with it, the share of simulations Brown wins. The interval also narrowed slightly at both ends as the model absorbed another poll.

Ohio matters to the broader picture because our Senate numbers are close to even. The model gives Democrats a 51 percent chance of a Senate majority and Republicans 48 percent, with a mean of 50.3 Democratic seats. Democrats need 51 seats for control; Republicans need 50, because the vice president is a Republican and a 50-50 tie goes to them. A seat with a 74 percent to 26 percent split, as this one now has in our forecast, is not decisive on its own, but it is one of the places where that arithmetic gets resolved.