The closely contested Texas U.S. Senate race between Republican Ken Paxton and Democrat James Talarico, rated a toss-up by multiple forecasters with polling margins under five points, is sustaining elevated trader expectations for general-election turnout in the 8.8M–10.8M range. Record primary participation exceeding 4.3 million ballots, including Democratic outperformance relative to Republicans, combined with intensive mobilization targeting suburban independents, Hispanic voters, and younger demographics, has increased engagement ahead of the November 3 contest. Both campaigns and aligned groups are emphasizing early voting outreach and issue messaging on the economy, while historical midterm patterns and the open-seat dynamics after the expensive Republican runoff introduce uncertainty over base versus crossover participation. Late polling shifts, differential advertising impact, or Election Day conditions could further separate the leading turnout brackets.