The competitive open-seat Iowa Senate race between Democrat Josh Turek and Republican Ashley Hinson, rated a toss-up with polling averages near even, anchors trader expectations for turnout in the 1.4M–1.5M range. Early voting through October 25 reached 265,000 ballots, up over 30 percent from the comparable 2022 point, though Democrats hold an edge in returned ballots while Republicans retain a registration advantage that historically drives stronger Election Day participation. Above-average midterm baselines from 2022’s 1.22 million votes, combined with campaign intensity in a battleground state and uncertainty over final mobilization, keep the leading buckets tightly bunched without decisive separation.