An Economist/YouGov poll from October 2026 shows many voters remain uncommitted. While most have chosen their candidates, a notable segment in Senate and House races could still shift before the November 3 election.
The 17% margin in seven key Senate tossups
The upcoming Senate elections feature several high-stakes battles where the outcome remains uncertain. According to the Economist/YouGov report, 78 percent of respondents have already decided on their preferred candidate, but 17 percent are still potentially swayable. this group includes 10 percent who might switch candidates and 7 percent who are completely undecided.
The survey identifies seven specific Senate races as critical tossups: Alaska, Iowa, Kansas, Maine, Michigan, Ohio, and Texas. In these states, the small percentage of undecided voters could prove decisive. As the election approaches, the focus will likely shift to additional battlegrounds in Georgia, Kentucky, Kansas, and North Carolina.
The 23% of Independents still weighing their options
Political affiliation plays a major role in how settled the electorate appears to be. While 89 percent of Democrats and 77 percent of Republicans say their minds are made up, Independents are far less certain. The Economist/YouGov poll found that 23 percent of Independent voters are still in flux, with 11 percent considering a different candidate and 12 percent remaining undecided.
This lack of certainty among Independents mirrors broader trends in recent election cycles , where middle-ground voters often act as the ultimate tiebreakers in tight races. Because Independents are less tethered to party lines, their movement in states like Ohio or Michigan could fundamentally alter the composition of the U.S. Senate.
A 15% undecided block in 21 congressional tossups
The uncertainty extends deep into the House of Representatives, where 21 congressional races have been categorized as tossups. The survey indicates that 80 percent of voters have made up their minds regarding their local congressional districts, but 15 percent remain undecided or open to changing their vote .
Of the 21 tossup races identified by the poll, the split is heavily weighted toward one party, with 15 red seats and only six blue seats currently in the balance. This distribution suggests that while Republicans have more individual seats at risk, the overall control of the House remains a volatile question.
The mismatch between voter predictions and the 21 red-leaning House tossups
There is a notable tension between how voters perceive the outcome and the actual number of contested seats. The report states that 43 percent of respondents believe Democrats will take control of the House, compared to only 30 percent who expect a Republican victory. Similarly, 40 percent anticipate Democratic control of the Senate, while 35 percent expect Republicans to maintain it.
However, several questions remain unanswered by the current data. It is unclear if the 15 percent of undecided House voters will trend toward the party they currently favor or if they will break in a way that defies the 43-to-30 percent prediction.. Furthermore, the poll does not specify if the 25 percent of respondents who are "not sure" about Senate control are leaning toward a specific party or are truly neutral.
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