Key Midterm Races That Will Decide Control of US Congress

Key Midterm Races That Will Decide Control of US Congress

Md Kazi Bijoy
October 3, 2026

The upcoming midterm elections on November 3 are set to serve as a major turning point for President Donald Trump’s second term. Voters across the United States will head to the polls to decide whether to maintain the Republican Party's hold on Congress or hand legislative control back to the Democrats. Current polling and voter sentiment indicators suggest that Democrats are well-positioned to reclaim the House of Representatives and potentially secure a majority in the Senate. Achieving victory in either chamber would significantly alter the political landscape, granting Democrats the power to block Trump’s legislative initiatives and launch intense investigations into his administration.

Currently, Republicans hold a slim majority in the Senate with 53 seats, compared to 47 held by Democrats and their independent allies. This November, 35 of the Senate's 100 seats are on the ballot. Because senators serve six-year terms, only about a third of the chamber faces voters in any given two-year election cycle. Despite the nationwide scale of the election, the true battle for the Senate is concentrated in a handful of highly competitive states.

Nonpartisan election forecasters, including the Cook Political Report, have identified seven key states as complete tossups: Alaska, Iowa, Maine, Michigan, New Hampshire, Ohio, and Texas. Meanwhile, North Carolina is currently leaning toward the Democrats, while Kansas is leaning toward the Republicans. To take control of the Senate, Democrats must flip at least four Republican-held seats.

The political environment has shifted dramatically since the beginning of 2026. Early in the year, Republicans seemed securely positioned to defend their Senate majority, with many seats rated as safe for the GOP and several Democratic-held seats considered highly vulnerable. However, as the year progressed, President Trump’s approval ratings declined amid widespread public dissatisfaction over the ongoing war with Iran and soaring gasoline prices. Consequently, major political forecasters began shifting their ratings for several key races in favor of the Democrats. Georgia, for instance, is now classified as a likely win for the Democratic Party.

Perhaps the most striking sign of Democratic momentum is in Texas, a traditional Republican stronghold that is now considered highly competitive. Recent polling indicates that the Democratic candidate holds a razor-thin lead in a state where no Democrat has won a Senate race since 1988. Texas has also consistently voted Republican in presidential contests; the last time the state backed a Democratic presidential nominee was during Jimmy Carter's presidency in the 1970s.

In the 2024 presidential election, Trump carried Texas with 56% of the vote to Kamala Harris's 42%. Running for the Senate seat this year is Democratic State Representative James Talarico, who has centered his campaign on addressing wealth inequality and raising taxes on billionaires under the slogan, "It's time to start flipping tables." He faces Republican incumbent and State Attorney General Ken Paxton.

Paxton has heavily emphasized his alliance with the president, showcasing an endorsement video recorded by Trump in the Oval Office. In the video, Trump praised Paxton for his efforts to "defend our southern border from the Obama and Biden invasions," to which Paxton replied, "Thank you very much, President Trump. We won’t let you down."

Economic populist themes are also central to the Senate race in Michigan, a swing state where a progressive Democrat is running for a seat left vacant by a retiring Democratic incumbent. Abdul El-Sayed, a former public health official endorsed by Kamala Harris and Bernie Sanders, is campaigning on a "Medicare for All" platform that proposes expanding the healthcare program to cover all Americans. El-Sayed, who recently clashed with Fox News host Jesse Watters over the projected costs of the healthcare expansion, currently holds a slight lead in a neck-and-neck race against Republican nominee Mike Rogers.

While Michigan is a crucial presidential swing state—with Trump winning it in 2016 and 2024, but losing it to Joe Biden in 2020—Democrats have historically dominated its Senate races, with no Republican winning a Senate seat in the state since 1994.

Iowa is shaping up to be another major testing ground for Democratic prospects. The state has trended heavily Republican in recent years, failing to elect a Democratic senator since 2008 despite voting twice for Barack Obama. This year, however, polls show a surprisingly tight race. Republican incumbent Ashley Hinson is running neck-and-neck with Democratic challenger Josh Turek, a two-time Paralympic gold medalist in wheelchair basketball. Turek recently released a campaign advertisement featuring him playing basketball with Obama, highlighting the last time a Democrat won the state.

Because Iowa's population is much more rural compared to states currently represented by Senate Democrats, a victory here would mark a significant expansion of the Democratic electoral coalition. Conversely, rural areas remain a primary source of strength for the Republican Party, which dominates the 14 states currently rated as solid Republican wins.

In addition to the battle for the Senate, control of the House of Representatives is fully up for grabs. Members of the House serve two-year terms, meaning all 435 seats are on the ballot. The fight for the House has been heavily influenced by an unprecedented wave of politically motivated redistricting. Following a redistricting conflict initiated by Trump last year, nine states redrew their congressional district boundaries. While some states redrew maps to favor Democrats and others to favor Republicans, overall analysis suggests the new boundaries will ultimately yield net seat gains for the GOP. These maps have faced numerous legal battles; the Virginia Supreme Court struck down a Democratic gerrymander, while the U.S. Supreme Court rejected a Republican redistricting effort in Missouri.

Despite the redistricting challenges, Democrats remain optimistic about reclaiming the House, with the Cook Political Report rating more than 40 races as highly competitive. Democrats need to win roughly half of these contested seats to secure a majority. Key districts highlight the diverse battlegrounds across the country. In the exurbs of New York City, Republican Representative Mike Lawler is seeking a third term in a swing district. Lawler has targeted his opponent, democratic socialist mayor Zohran Mamdani, declaring that "socialism, communism and Marxism have no place in New York City and no place in America." Meanwhile, in northwestern Ohio, Democratic Representative Marcy Kaptur is fighting to retain her seat.

Having served since 1983, Kaptur is the longest-serving woman in congressional history. Her district is one of nearly two dozen Democratic-held seats that Trump won in 2024, and newly redrawn boundaries have made the district even more Republican-leaning, making her race a major test of split-ticket voting. In California, Republican incumbent David Valadao is facing intense scrutiny over his vote for the Trump-backed "One Big Beautiful Bill." The legislation extended tax cuts for wealthy individuals and corporations while cutting funding for Medicaid, a program that serves a massive portion of Valadao's own constituents.

Regardless of which party emerges victorious, the final margin of control in the House could be in the single digits, continuing a trend seen over the last four years. However, there remains a possibility of a broader "blue wave" that could carry Democrats to victory even in districts that Trump won by wide margins in 2024. Historically, midterm elections heavily favor the party out of power, particularly in the House. Every recent U.S.

President has lost control of at least one congressional chamber during a midterm election, including Trump during his first term in 2018. Nationwide polling indicates a broad shift toward the Democrats, even in historically Republican states. Generic congressional ballot polls, which measure overall party preference, show Democrats leading by margins ranging from high single digits to low double digits.

This shift has been largely driven by global and economic developments over the past year. The war with Iran and its subsequent impact on inflation have fundamentally altered the electoral landscape, giving Democrats a clear opening. Democratic candidates have focused heavily on the rising cost of living, pointing to how the Trump administration's actions in the Middle East have driven up prices for gasoline and diesel. Surveys show that the economy remains the single most important issue for American voters, far outpacing concerns over immigration, healthcare, or civil rights.

At the same time, Trump’s personal approval rating has plunged to 32% according to a Reuters/Ipsos poll. This mark is lower than his previous low of 34%, recorded by Gallup in January 2021 following the attack on the U.S. Capitol. The 2026 midterms are shaping up to be a severe political test for the president, with the final outcome determining whether voters will force a change of course in Washington.


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Content: Collected | Source: The Guardian

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