Minnesota Senate poll has Democrat at 48.9-45.4 as our forecast eases to 90 percent

A Quantus Insights survey of 720 likely voters in Minnesota, fielded September 8-10, put the Democrat at 48.9 percent and the Republican at 45.4 percent. That is a gap of three and a half points on a sample of that size, close enough that the poll on its own does not establish who is ahead. It is best read as a close race.

Our model now gives the Democrat a 90 in 100 chance of winning the seat, down from 95 percent in our previous run earlier this morning. The projected margin moved with it, from D+10.3 to D+7.9. The wider change is at the edge of the distribution: our 5th-to-95th percentile range now runs from R+2.2 to D+17.9, where before it ran from D+0.2 to D+20.3. In other words, the model has stopped treating a narrow Republican win here as essentially off the table.

That is a shift in degree, not in direction. Minnesota remains one of the more favorable Senate races in our forecast for Democrats, and the new poll is consistent with the mid-single-digit Democratic edge our average has carried through late summer. The seat is open; the incumbent, Democrat Tina Smith, is not on our candidate list for it.

The national picture is closer. Our model gives Democrats a 47 percent chance of Senate control and Republicans 53 percent, with a mean of 50.1 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. Our generic-ballot average stands at D+6.7 across 24 polls over the past 45 days. Races like Minnesota, where the Democratic edge is real but not insulated, are why that Senate number sits near a coin flip.