The range of outcomes in the 2026 battle for the Senate is enormous

J. Scott Applewhite/AP

Imagine when the dust settles on the 2026 midterm elections that Democrats haven’t gained a single Senate seat and are stuck at 47.

Now imagine it’s a week after the election, and Democrats have won 55 seats — or even as many 57 — giving them the second-largest Senate majority for either party since 1981.

The distance between those two outcomes isn’t nearly as large as you might think.

With just five days left in the 2026 election, there is a huge margin of error in the battle for the Senate — with many races showing no clear leader in the polls.

More than a dozen seats have polled mostly within the margin of error (six seats) or just outside of it (five seats), or the races appear competitive but there’s not high-quality polling (two others).

Also looming large is the fact that Democrats are mostly chasing states that President Donald Trump won by double digits in 2024 — and where it’s feasible that large numbers of conservative voters come home to their side at the very end of the election.

Let’s break it down.

Recent New York Times/Siena and CNN polls have filled out the picture in many key Senate races. And several races that are likely to determine the majority are well within the margin of error.

The CNN poll in Michigan shows Democrat Abdul El-Sayed up by 7 points, but 6 of the last 8 quality polls there have shown no clear leader.

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Likewise, the CNN poll in Texas shows Democrat James Talarico ahead by 6 points, but 6 of the last 9 quality polls have shown no clear leader.

The CNN poll in Kansas is now the second of two quality polls to show no clear leader.

The last five quality polls in Iowa have shown no clear leader.

The first quality poll in South Carolina this week was a dead heat, at 48%-48%.

And CNN’s poll in Maine makes it six quality polls in a row — and 11 of the past 12 — where there has been no clear leader.

Even if we assume only those races are in-play — and the rest of the races go as expected — the possible outcomes range between Democrats winning 49 seats and winning 55 seats.

(That’s a one-third chance of Democrats remaining in the minority; Democrats winning 50 seats would keep Republicans in control, by virtue of Vice President JD Vance’s tie-breaking vote.)

Beyond those six races:

Three states — Alaska, Florida and Ohio — generally feature one candidate leading just outside the margin of error, usually in the mid-single digits. And a polling error like we’ve seen in recent years suggests they could be in play, too.

Two blue states — Minnesota and New Hampshire — are looking safer for Democrats in quality polling, but that data is very limited, and it’s not outside the realm of possibility that those seats flip to the GOP.

And the GOP could seemingly lose two states with limited polling — Mississippi and Nebraska — where they’re generally favored but Republicans have felt compelled to defend their incumbents. (Nebraska GOP Sen. Pete Ricketts’ opponent is an independent, Dan Osborn, rather than a Democrat.)

If Democrats were able to win all the margin-of-error races; plus North Carolina, Ohio and Alaska, where the polls are more in their favor; and add Florida and Mississippi, they’d be up to 57 seats. The GOP losing Nebraska would make the Democratic majority 57-42, if Osborn didn’t caucus with either party.

Only once since 1981 has one side or the other controlled more of the Senate than that. That was after the 2008 election, when Democrats had 59 seats (and later won a special election to get to 60 seats).

But it’s also possible Democrats could have a pretty good election, notching one of the biggest popular-vote wins in recent decades, and still come up short of a Senate majority. That could happen if they lose one or both of Maine and Michigan, or if they don’t win enough of the double-digit Trump states they’ve been chasing.

Even if the popular-vote margin from the 2024 presidential race moved uniformly toward Democrats by 10 points in every state, that only gets them to 49 Senate seats.

And it’s worth noting that in CNN’s polls of Michigan, Texas and Kansas, at least 1 in 8 likely voters say they could still change their minds about whom to support. In Texas and Kansas, at least 6 in 10 of those uncommitted likely voters are Republicans or Republican-leaning independents, suggesting there is room for political gravity to work in the GOP’s favor as voters settle on their decisions.

In other words, buckle up. The battle for the Senate could go so many different ways, with massive implications for the final two years of Trump’s second term.

J. Scott Applewhite/美联社

想象一下，当 2026 年中期选举尘埃落定时，民主党人没有赢得一个参议院席位，仍然停留在 47 个席位。

现在想象一下，选举一周后，民主党赢得了 55 个席位，甚至多达 57 个席位，使他们获得了自 1981 年以来两党在参议院的第二大多数席位。

这两种结果之间的差距远没有你想象的那么大。

距离 2026 年大选仅剩五天，参议院的争夺战存在巨大的误差空间——许多竞选在民调中都没有明显的领先者。

十几个席位的民调结果大多在误差范围内（6 个席位）或略微超出误差范围（5 个席位），或者竞选看起来很激烈，但没有高质量的民调（另外两个席位）。

另一个不容忽视的事实是，民主党人主要在争取唐纳德·特朗普总统在 2024 年以两位数优势赢得的州——在这些州，大量保守派选民有可能在选举的最后阶段倒向民主党。

让我们来详细分析一下。

近期《纽约时报》/锡耶纳学院和CNN的民调显示，许多关键的参议院席位争夺战形势更加明朗。而一些可能决定多数席位归属的选战，最终结果都在误差范围内。

CNN在密歇根州的民调显示，民主党候选人阿卜杜勒·埃尔-赛义德领先7个百分点，但该州最近8次高质量民调中有6次没有显示明显的领先者。

通往2026年中期选举的道路现在开始

每周，亚伦·布莱克都会以犀利的分析，拨开政治迷雾，深入剖析可能决定国会控制权的选情、候选人和趋势。订阅《20/26 视野》周刊，了解今年中期选举的最新动态。

同样，CNN在德克萨斯州的民调显示，民主党候选人詹姆斯·塔拉里科领先6个百分点，但最近9次高质量民调中有6次没有显示明显的领先者。

CNN在堪萨斯州进行的民意调查是目前两项高质量民意调查中的第二项，结果均未显示明显的领先者。

爱荷华州最近五次高质量民调均未显示有明显的领先者。

本周南卡罗来纳州的首次高质量民意调查结果为48%比48%，双方势均力敌。

CNN在缅因州进行的民意调查显示，连续六次高质量民意调查（以及过去12次民意调查中的11次）都没有出现明显的领先者。

即使我们假设只有这些竞选结果待定——而其余的竞选结果都按预期进行——民主党可能赢得 49 个席位到 55 个席位。

（这意味着民主党有三分之一的概率继续保持少数党地位；即使民主党赢得50个席位，共和党仍将掌控大局，因为副总统JD·万斯拥有打破僵局的关键一票。）

除了这六项赛事之外：

阿拉斯加、佛罗里达和俄亥俄这三个州，通常都有一位候选人以微弱优势领先，领先幅度通常在个位数左右。而近年来民调误差频发，表明这三个州的选情也可能出现胶着状态。

根据高质量的民调显示，明尼苏达州和新罕布什尔州这两个蓝州对民主党来说似乎更稳固，但这些数据非常有限，这些席位翻向共和党也并非不可能。

共和党似乎可能会在民调数据有限的两个州——密西西比州和内布拉斯加州——失去席位。尽管共和党在这两个州通常占据优势，但他们一直感到有必要捍卫现任议员的席位。（内布拉斯加州共和党参议员皮特·里基茨的对手是独立人士丹·奥斯本，而不是民主党人。）

如果民主党能够赢得所有胜负难分的州，再加上民调显示他们更占优势的北卡罗来纳州、俄亥俄州和阿拉斯加州，以及佛罗里达州和密西西比州，他们将获得57个席位。如果共和党输掉内布拉斯加州，假设奥斯本不与任何一方结盟，民主党将以57比42的席位优势占据多数。

自 1981 年以来，只有一次两党之一控制的参议院席位超过这个数字。那是在 2008 年大选之后，当时民主党拥有 59 个席位（后来又赢得了一次特别选举，获得了 60 个席位）。

但民主党也有可能赢得大选，取得近几十年来最大的普选胜利之一，却仍然无法获得参议院多数席位。这种情况可能发生在他们输掉缅因州和密歇根州中的一个或两个，或者没能赢得足够多的他们一直力争拿下的特朗普支持率最高的几个州时。

即使 2024 年总统大选的普选票优势在每个州都向民主党倾斜 10 个百分点，他们也只能获得 49 个参议院席位。

值得注意的是，CNN对密歇根州、德克萨斯州和堪萨斯州的民调显示，至少八分之一的潜在选民表示，他们仍有可能改变主意，决定支持哪位候选人。在德克萨斯州和堪萨斯州，这些尚未决定支持哪位候选人的潜在选民中，至少十分之六是共和党人或倾向于共和党的独立人士，这表明，随着选民最终做出决定，政治风向仍有可能向共和党倾斜。

换句话说，做好准备吧。参议院的控制权之争可能出现多种不同的结果，对特朗普第二个任期的最后两年将产生巨大影响。