The latest projection for the House of Representatives shows little overall change from our previous update, released this weekend, but the Republican position has improved slightly. They are now given a 75 percent chance of winning the House on Nov. 2, up from 73 percent previously. During an average simulation run, the Republicans finished with a total of 228 seats (up from 227): this would reflect a net gain of 49 seats from their current position.
As I have warned repeatedly in the past, we believe that the uncertainty in the forecast is intrinsically quite high, stemming from the unusually large number of seats in play, and from differences of opinion among pollsters in how to calibrate their likely voter models to account for the so-called “enthusiasm gap.” There are only 170 seats that the model thinks of as “safe” Republican — those where their chances of winning are 95 percent or higher. However, there are only 151 seats that the Democrats are at least 95 percent assured of winning.