On November 3, American voters will flock to polling stations across the country to cast ballots that will shape the remaining two years of Donald Trump’s second presidential term. While thousands of state and local government seats are up for grabs, the national spotlight remains fixed on the fight for control of the 118th US Congress – the bicameral legislative body currently held by Trump’s Republican Party. The balance of power in the House of Representatives and Senate will ultimately determine the success or failure of Trump’s policy agenda in his final term, making this midterm election one of the most closely contested in modern US history. What follows is a breakdown of the key dynamics, competitive races, defining issues, and unprecedented spending that are shaping this battle for control of Washington.
Democrats’ optimism about flipping both chambers of Congress stems largely from Trump’s persistently low approval ratings, a well-documented predictor of electoral performance for the sitting president’s party. According to polling outlet Silver Bulletin, Trump entered his second term with approval just above 50%, but the figure quickly dropped into the low 40s. By late February, when Trump joined Israel in launching airstrikes against Iran, his approval hovered around 42% – it immediately fell below 40% after the strikes, and currently sits at roughly 37%.
To put this number in context, eight years ago at this same point in Trump’s first term, his approval stood 6 points higher at 43%, while Joe Biden held a 40% approval rating at the same stage of his presidency. In both of those prior midterms, the sitting president’s party lost control of the House of Representatives while retaining a narrow majority in the Senate. Trump’s current weaker standing has encouraged Democrats to target even long-held Republican strongholds, expanding their map of competitive races.
In the House, Republicans currently hold the narrowest possible majority: 218 seats – the exact minimum required to control the chamber, plus one independent who caucuses with the GOP. Every one of the 435 House seats is up for reelection this November, as representatives serve only two-year terms. Most congressional districts are drawn to favor one party, however, leaving just a small fraction of competitive contests. Nonpartisan election analysis outlet Cook Political Report currently classifies only 21 House seats as true toss-ups. Of those competitive districts, 15 are held by incumbant Republicans and six by Democrats. Democrats need to flip just five of these toss-up seats, combined with their existing hold on 28 seats rated likely or leaning Democratic, to claim a House majority.
History is on Democrats’ side in the House. Midterm elections have long functioned as a referendum on the sitting president, with the White House party typically losing large numbers of House seats. Average data going back to 1934 shows the president’s party loses 27 House seats on average, and has only gained seats in three of the 23 midterms held over that period.
Republicans hold a more secure position in the Senate, where they currently control 53 of 100 seats, compared to 45 for Democrats and two independents who caucus with the opposition. Unlike House members, senators serve six-year terms, meaning only one-third of the chamber is up for election every two years. Thirty-three Senate seats plus two special elections, for a total of 35, will be decided in November. Per Cook Political Report’s analysis, just seven of these races are toss-ups. Six of those competitive seats are currently held by Republicans, and one by Democrats. To reach the 51-seat threshold needed for a Senate majority, Democrats need to win four of these toss-up seats plus hold all four of their seats rated likely or leaning Democratic.
Claiming that majority will be an uphill climb for the party. Democrats first need to defend their open seat in Michigan, where polls show a tight race between left-wing outsider Abdul El-Sayed and Republican challenger Mike Rogers, a former FBI agent and close Trump ally. They also need to flip seats in states that Trump won by double-digit margins in the 2024 presidential election, including Alaska, Iowa, and Ohio. Even deep-red Texas offers Democrats a surprise pickup opportunity: former teacher James Talarico is locked in a close race with state attorney general and Trump ally Ken Paxton, and a victory would make Talarico the first Democrat to win a Texas Senate seat since 1988. Polls currently show Talarico within striking distance of an upset.
The outcome of the election will have direct consequences for Trump’s legislative agenda for his final two years, and key voter issues have already shaped the contours of the campaign. During his 2024 presidential run, Trump pledged to curb inflation and lower the cost of living for American households, a promise that has been upended by geopolitical events. In his February 24 State of the Union address, Trump celebrated that gas prices had fallen below $2.30 per gallon in most US states – but just four days later, the Iran airstrikes disrupted Middle Eastern energy supplies, pushing national average gas prices above $4 per gallon.
The ongoing conflict has grown increasingly unpopular with American voters as economic fallout drives up everyday costs, with an August poll finding 63% of respondents disapprove of Trump’s handling of the Iran operation. Beyond the cost of living and foreign policy, top voter concerns include healthcare and immigration. Trump has touted his administration’s immigration policies as a major success, pointing to sharply lower illegal border crossing numbers compared to prior administrations. Democratic candidates, by contrast, have centered their campaigns on protecting access to affordable healthcare, criticizing the impact of Trump-era healthcare legislation on out-of-pocket costs for consumers.
While most polling and analysis favors Democrats ahead of election day, history has shown Trump and the Republican Party have repeatedly outperformed pre-election polling projections. One major advantage the GOP holds this cycle is a massive financial edge over the opposition. As of the end of August, the Republican National Committee and its affiliated groups held more than $600 million in cash on hand, compared to just under $400 million for the Democratic Party. On top of that, Trump’s main political action committee, MAGA Inc., holds an additional $400 million in campaign funds built up from the “Make America Great Again” movement’s donor network.
Republicans have poured that financial advantage into a massive late-cycle advertising blitz. Research firm AdImpact reports that more than $1 billion in political ads aired to US voters in September alone, with Republican groups outspending Democrats by $200 million. The GOP has outspent Democrats on advertising in nearly every competitive Senate toss-up race, a push designed to boost Republican turnout and limit Democratic gains on election day.
Regardless of the outcome, all eyes will quickly shift to the 2028 presidential election once the votes are counted. Trump’s low approval has dominated the midterm narrative, but since he is constitutionally barred from running for a third term, the post-election conversation will move beyond opposition to Trump to center on what the Democratic Party offers voters for the future of the country.