As of 11:00 a.m. eastern on October 22, the betting markets at PredictIt.org were projecting a 2 seat Republican pick-up in the Senate. Democrats Heidi Heitkamp (ND) and Claire McCaskill (MO) have less than 50-50 odds of keeping their job. No other incumbent is given less than a 50-50 chance of winning.
Still, there’s plenty of room for change–in either direction. The most vulnerable Republican, Dean Heller (NV), is considered a 50-50 shot. Two other Democrats, Bill Nelson (FL) and Joe Donnelly (IN), are seen as having just slightly better than even money odds. That suggests a range of potential outcomes with the GOP gaining anywhere from one to four seats.
Overall, the Democrats are given just a 16% chance of winning the Senate this year.