With fewer than three weeks until the November 3 midterm elections, Republican and Trump-aligned groups have poured more than $740 million into congressional races. Tesla and SpaceX CEO Elon Musk has donated another $276 million to Republican groups since July. Yet the spending has not clearly shifted polling in key contests, and Republicans are redirecting money from planned challenges toward defending seats.
From Labor Day through October 14, Republican groups spent more than $740 million on congressional elections, including at least $220 million from organizations linked to Donald Trump. Despite the party’s substantial reserves, Democrats remain ahead in polls in several competitive Senate races. Political analysts say advertising can amplify a candidate’s message but is unlikely, on its own, to overcome an unfavorable political environment.
Musk and Republican groups hold a major cash advantage
Republicans entered the final stretch with a significant financial edge. Federal Election Commission filings show that Trump-aligned MAGA Inc. held nearly $416 million as of the end of August. Major Republican groups collectively had about $1 billion available, compared with $579 million for their Democratic counterparts.
Musk had previously said he would scale back his involvement in this election cycle. Since July, however, he has given more than $276 million to Republican groups, including $158 million to Senate Leadership Fund, a super PAC supporting Republican Senate candidates, and more than $76 million to his own America PAC. Including known federal political donations earlier in the cycle, Musk’s total is about $366 million, making him the largest individual donor identified so far.
Big donations are concentrated beyond Musk. Nine of the 10 largest individual and family donor groups in this election cycle have close ties to Republicans, accounting for 86% of the top 10 groups’ combined giving. Hillary Braseth, executive director of campaign-finance watchdog OpenSecrets, said the scale and concentration of political influence and wealth in this cycle are unprecedented.
Political advertising is also on track to set a record. AdImpact forecasts $11.6 billion in political ad spending across the 2025–26 election cycle, exceeding the totals for both the 2022 midterms and the 2024 presidential cycle.
Higher TV ad costs dilute Republicans’ spending edge
A larger war chest does not necessarily buy proportionally more television exposure. Candidates receive the lowest unit rates for broadcast ads during the final 60 days before an election, a discount that outside groups such as super PACs do not get. Some Republican funds arrived later and were spent through outside groups, which face higher TV costs. Democratic candidates, meanwhile, have generally raised more campaign money than their Republican opponents.
The Texas Senate race illustrates the gap. From October 1 to 14, Democrat James Talarico’s campaign spent about $2.4 million on local TV ads in Dallas, reaching the average viewer an estimated 48 times. A political action committee supporting Republican candidate Ken Paxton spent about $7.8 million, for an estimated 81 exposures per average viewer. Spending more than three times as much produced only about 70% more exposure.
As ad rates climbed, Paxton’s supporters began buying spots during nationally televised sports events. The strategy aims to reach enough Texas voters at a lower cost than buying airtime market by market across the state. On October 5, Republican Senator John Cornyn of Texas wrote on X that the party’s financial advantage was not as large as it appeared.
Across the nine key Senate contests identified by the Cook Political Report on October 1, Republicans led broadcast TV spending in seven states through September 30. Their total spending was 26% higher than Democrats’, but they aired only 7% more ads. Pricing differences between super PACs and candidates are smaller in digital advertising, but television remains a major channel and is expected to account for 48% of all ad spending in this election cycle.
Negative ads have not clearly shifted key Senate polls
Since the Texas primary, more than $113 million has been spent on attack ads targeting Talarico. A Siena College poll released in October nevertheless showed him leading Paxton 48% to 44%. The margin was only slightly narrower than in September, when Talarico led by six points.
Michigan has seen a similar pattern. More than $87 million has been spent this year on attack ads against Democrat Abdul El-Sayed. A late-September Fox News poll found his favorability among registered voters had risen five points since early August, while Republican candidate Mike Rogers’ favorability had fallen four points.
Advertising specialists say repeated exposure to the same persuadable voters yields diminishing returns as Election Day approaches. Michael Beckel, head of political-funding reform group Issue One, said a voter who has already seen 20 negative ads in a day may not be persuaded by a 21st and could simply ignore it.
Republicans argue that polling margins alone do not capture the impact of their spending. They say a late influx of money in September helped some candidates remain competitive despite a worsening political environment. In the Texas Senate race, Republicans spent $121.5 million in September, compared with a combined $5.5 million over the previous three months. Musk’s America PAC also expanded its mail and door-to-door canvassing efforts. One Republican involved in the race said the money had not put Paxton ahead, but had kept a difficult contest from becoming unwinnable.
Maine’s Senate race offers another test of campaign spending. Republicans have invested more than $50 million to support incumbent Senator Susan Collins, nearly twice the Democratic spending. Since early September, Democrat Troy Jackson’s lead in the FiveThirtyEight polling average has narrowed from about three points to about two.
Spending shifts to defense as expansion plans shrink
The clearest change in Republican strategy is the movement of money toward seats once seen as relatively safe. In April, Senate Leadership Fund announced a record $342 million advertising budget across eight states to protect the Senate majority and expand the party’s reach. Texas, Kansas and Nebraska were not on the list. Since September 1, however, the group and its affiliates have spent or committed about $180 million across those three states. Trump won each by double digits in the 2024 presidential election.
Beckel of Issue One said outside groups are moving millions of dollars into deep-red states to bolster defenses, leaving some seats Republicans had hoped to contest without enough late-stage funding. The shift is particularly visible in North Carolina. Senate Leadership Fund initially pledged $71 million to support Republican candidate Michael Whatley, but withdrew most of its remaining ad bookings on October 2 after spending about $32.8 million. Democrat Roy Cooper continues to lead by double digits in polling averages. The pullback stands out in a state where Republicans have won every presidential and Senate election since 2008.
House spending is also being reshuffled. This week, the Congressional Leadership Fund stopped supporting New Jersey Republican Representative Thomas Kean Jr. and Iowa Representative Mariannette Miller-Meeks, and dropped plans to contest the seats held by Michigan Representative Kristen McDonald Rivet and Ohio Representative Greg Landsman. The four races had received about $13.7 million from the group through October 14. About $10 million is being redirected to 16 other districts, including the South Texas district represented by Republican Representative Monica De La Cruz.
The Cook Political Report sees Democrats as more likely to win control of the House while remaining competitive in the Senate. As Republicans use more of their resources to defend seats, their expansion plans are narrowing. Whether the remaining advertising can change voters’ views will be tested at the ballot box.