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Democrats took back control of Congress with resounding wins nationwide on Tuesday. Why, and how?
The Insight provides you the full picture of facts and viewpoints on a top issue for Americans each week, powered by your questions and balanced answers from our multipartisan news team.
The Questions
Which issues played the biggest role?
Pre-election polling suggested that the economy, the war in Iran, and data centers were the biggest issues on voters’ minds as they filled out their ballots.
BBC (Center bias) cited the SSRS Voter Poll and reported that 39% of Americans polled said that the economy is the most important issue facing the country, with 65% of respondents believing President Donald Trump's policies have worsened economic conditions. Additionally, 79% of respondents said inflation had caused them or their families hardship in the past year.
Axios (Lean Left bias) highlighted how voters responded to data centers with their votes and noted that "leaning into AI skepticism" was a "winning strategy" for the party. Democratic candidates won in Texas, Ohio, Georgia, Arizona, and other states with platforms based on restrictive policies on data centers in their states.
Americans across the US voted to impose moratoriums on data centers in their local areas. Exit polls from NBC (Lean Left bias) show that AI and data centers played a crucial role in their decisions about Congress for 56% of voters, and 76% of voters said they would oppose the construction of new data centers in their communities.
Finally, Americans indicated that the war in Iran, which has affected both the nation’s foreign policy and military as well as the domestic economy, was a significant factor in voting decisions.
Which voting groups played key roles?
The Associated Press (Lean Left bias) AP Voter Poll surveyed over 100,000 voters nationwide. It compared their 2026 votes for the US House to their support for Trump and former Vice President Kamala Harris in 2024. The results showed the largest shifts among Hispanic and young voters.
Youth Vote
In 2026, 70% of voters under 30-years-old supported Democratic candidates in their local US House races compared to roughly 30% who supported Republicans. In 2024, young voters were nearly split between Trump (47%) and former Vice President Kamala Harris (51%).
Hispanic Voters
Sixty-four percent of Hispanic voters supported Democratic candidates in 2026 compared to roughly 40% of Hispanic voters who supported Trump in 2024. The Hill (Center) wrote that in 2024, Trump winning 44% of Latino voters “represented the best performance of a GOP presidential nominee with Latino voters since at least 2004.” It pointed to the “controversial immigration enforcement actions” taken by Trump and his administration, which it said cost them the Latino vote this cycle.
Young White Men
This group shifted 25 points toward Democrats, according to a poll cited by The Post Millennial (Right). Trump won the same demographic by 28 points in 2024. In an opinion for The Daily Wire (Right), Matt Walsh (Right) wrote, “In other words, in just two years, the Republicans have completely alienated one of the major demographics that their policies were supposed to help.” He described the loss as “a stunning failure” and it “illustrates [a] deeper problem” that “Republicans still won’t speak to white men, or acknowledge them as a group, except to cast them as the villains.”
Moderate Voters
An NPR (Lean Left) poll found that Republicans saw their worst performance with independent voters since 1998. About 67% of moderate voters supported Democratic candidates in their local House elections versus about 60% who supported Harris in 2024. The poll also showed that in 2026, Democrats gained 20 points among independent voters compared to in 2024, when they had gained 1 point among independent voters.
White Voters
White voters were split in their votes for Republican House candidates (49%) and Democrat House candidates (49%) in 2026. In 2024, 59% of white men and 51% of white women supported Trump, according to Pew Research Center (Center).
Black Voters
Ninety percent of black voters supported Democrat candidates this election cycle, up from 83% who supported Harris in 2024. The Associated Press noted the shift was primarily among black men. Democrat support among black women remained relatively the same between 2024 and 2026.
By Gender
The same NPR poll found that Democrats won 19 points among female voters in 2026 compared to winning 6 points in 2024. Among male voters, Democrats won 2 points in 2026, while Republicans had won 14 points in 2026. The Hill said the shift among men happened across racial groups, which could signify “that the GOP had more ground to lose with men” compared to female voters.
Where did Republicans go wrong?
In a post on X on Wednesday, Vice President JD Vance listed four reasons why previous Trump voters abandoned the Republican party to vote for Democrats.
The War With Iran
“The reason we lost is the war,” Vance wrote. The National Desk (Right) highlighted both Vance’s post and one from former Georgia GOP Rep. Marjorie Taylor Greene. Greene said that Vance and President Donald Trump should have listened to her and former Fox News host Tucker Carlson (Right) regarding the Iran war, but instead “Trump called us panicans and me a traitor and you [Vance] stayed silent and supported Trump while he failed.”
To some, the war with Iran was just one aspect of Trump failing to follow through on promises he made during his 2024 campaign.
Cost of Living
Foreign wars have not historically swayed domestic elections unless there are direct impacts on voters’ economic well-being or involve heavy casualties.
The current conflict in the Middle East, however, has had an economic impact felt within the US, with rising gas prices that prompted both midterm speculation and criticism of Trump. While Trump pointed out that gas prices under Biden were higher under former President Joe Biden than during the Trump administration, it didn’t seem to suppress the ongoing debate over affordability and policy.
These concerns potentially caused Trump’s approval rating to hit a new low in October. To add on to the issues with gas prices, the housing market saw a decline in both sales and construction in September.
Relationship With Israel
Some cited the Trump administration’s ties with Israel as another plausible reason for what some have deemed the 2026 midterm “blue wave.”
The Washington Post (Lean Left) highlighted this in recent coverage, saying that while “Democrats and Republicans might be deeply split after the midterms,” a “growing number agree on one big idea: The era of unquestioned U.S. support for Israel needs to end.” The article called the issue a “rare proposal” uniting Vance and “leftist” senator-elect from Michigan, Abdul El-Sayed.
CNBC (Lean Left) said that the American Israel Public Affairs Committee (AIPAC) planned to stop endorsing candidates and making direct contributions after facing “mounting political pressure.” According to the aforementioned Washington Post article, open support for Israel had become “politically toxic.”
Latino Support
An NBC/Telemundo survey found that “fifty-nine percent of Latinos favor[ed] a Democrat-led congress. The data showed that 74% disapproved of Trump's handling of the economy, 78% disapproved of his handling of the cost of living, and 67% said Trump “has gone too far” with his immigration policies.
What comes next?
Here’s what happens immediately:
- Democrats now have complete control over committee hearings and floor votes, can halt conservative judicial appointments, and can wield the majority veto power over regulatory vacancies.
- Committee control changes hands, enabling Democrats to more easily launch targeted investigations, issue subpoenas, and scrutinize administration policies and corporate practices.
- New Democratic Senate leadership will likely use floor time to advance high-profile votes on issues like healthcare costs and voting rights, defining the party's platform heading into the 2028 presidential cycle.
Meanwhile, a Republican still occupies the White House, which means the GOP can still act on at least some of its priorities. Several major news sources across the spectrum reported this week that the Trump administration plans to ramp up military operations against Iran soon after the midterms.
And what do the results mean for the 2028 presidential field? According to Polymarket, the current top six favorites include three Republicans and three Democrats. Georgia Senator Jon Ossoff moved into the top spot (18% chance of victory) after his win on Tuesday, leapfrogging Vance.
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