Recent polling aggregates for the 2026 Senate contests show Iowa’s open-seat race between Democrat Josh Turek and Republican Ashley Hinson remaining extremely tight, with averages near a one-point margin and frequent results within the margin of error across multiple surveys through mid-October. Maine’s contest pits incumbent Republican Susan Collins against Democrat Troy Jackson, where Jackson has held a steadier two-to-three-point edge in most recent polls. Iowa’s smaller and more volatile polling spreads, combined with its toss-up rating by forecasters, have produced the narrower expected margin that underpins the 61 percent trader consensus favoring Iowa as the closer race. No major candidate changes or late-breaking events have altered these patterns in the past month.