The number of Republican-held Senate seats considered toss-ups or leaning Democratic has doubled from three to six as the critical homestretch of the midterm election season begins, according to The Cook Political Report. In May, only the GOP-held seats in North Carolina, Maine, and Ohio were viewed as competitive. That list has now expanded to include Texas, Iowa, and Alaska.
President Trump carried four of these six states by double-digit margins in 2024, with Maine being the exception. Senate Majority Leader John Thune acknowledged the shifting landscape, stating, "I worry about that, for sure. I’m a realist, and … I don’t ever try and sugarcoat things. I think it’s a competitive environment right now."
Republicans are currently at risk of losing six of their 53 Senate seats, while Democrats face potential losses in three seats. According to the RealClearPolitics polling aggregate, Republicans are trailing in eight of the nine competitive Senate races, with Iowa being the only state where the Republican candidate holds a lead in the polls. Most of these closely contested races, excluding Georgia and North Carolina, are within the typical margin of error, a trend corroborated by data aggregation methods that weigh credible polls more heavily.
A GOP operative involved in Senate races conveyed a message of continued optimism despite the polling data, noting, "National Republicans have been sounding the alarm that midterms are hard since last year, and we’ve been firm that not a single race should be taken for granted. Republicans continue to believe we’ll hold the Senate."
Some Republicans find solace in historical polling trends, pointing to instances where polls have underestimated their voter support in recent cycles. An analysis by Echelon pollster Patrick Ruffini indicated that over the past four election cycles, an average of 3,312 polls underestimated Republicans by 3.7 percentage points, with the error rate increasing to 5.9 percentage points in some instances.
An example cited was Senator Susan Collins' 2020 race, where polling aggregates showed her trailing by approximately 5 percentage points, yet she ultimately won by 8.6 percentage points. More recently, polling data overestimated a candidate's support in a Michigan primary by about 9 percentage points. CNN data guru Harry Enten has noted that if polling errors in the upcoming elections mirror past cycles, Republicans could potentially retain control of the House despite being viewed as underdogs.
Furthermore, President Trump's MAGA Inc super PAC possesses significant financial resources, and the official GOP campaign committees are reportedly better funded than their Democratic counterparts. This financial advantage is beginning to be deployed.
Democrats aim to capitalize on President Trump's approval ratings, persistent high gas prices, affordability concerns, and internal GOP divisions regarding the war in Iran and the Epstein files. A recent Gallup poll indicated that Democrats hold their largest party identification advantage over Republicans since around 2008, with a roughly 10-point lead.
Historical trends for midterm elections typically disadvantage the party holding the White House. However, this pattern has primarily applied to the House, not necessarily the Senate. Both former President Trump and President Joe Biden gained Senate seats during the midterms of their first terms, despite facing significant losses in the House.