As Democrats continue to lead in the polls heading into the midterm elections, the Republican case for optimism increasingly hinges on the party’s apparent advantages in independent spending resources—a subject of extensive mediaattention over the past few weeks. One recent article even boiled the midterms down to a fight between two contrasting financial indicators—high gas prices on one side versus bulging Republican campaign war chests on the other.
That’s a clever frame, but it’s a bit misleading. Spiking fuel costs and other consumer expenses will matter a lot more to the outcome in November than differential party spending. Survey evidence already makes it clear that affordability concerns are the main reason why voters are dissatisfied with the job performance of President Trump and his Republican allies, and now express a preference for Democratic control of Congress despite substantial reservations about the Democratic Party and its leadership. Democrats are not guaranteed a sweeping victory—but if they fall short of the analysts’ current bullish projections, the explanation will almost certainly involve a combination of biased polling, an unfavorable electoral map (especially in the Senate), and a late change in the national climate rather than a decisive knockout at the hands of Republican super PACs.
Money surely matters in politics, but it’s subject to diminishing returns. Once candidates have enough resources to introduce themselves to voters and make their case for why they deserve election over their opponent, the marginal impact of each additional dollar spent begins to decline. And in virtually all pivotal races these days, both parties are well-funded to the point of saturating the airwaves, muting the power of any numerical advantage. If a persuadable voter sees 2 ads for Candidate A and only 1 for Candidate B, that might work to Candidate A’s benefit. But if he or she sees 40 ads for Candidate A—or the same ad 40 times—and 20 for Candidate B, it’s pretty hard to imagine the disparity being decisive.
And even repeated exposure hardly guarantees that a message has any effect. Most viewers are instinctively skeptical of the claims made by politicians, parties, and political groups. Creating the “killer ad” is far from an exact science, and the constantly shifting political environment means that an effective playbook in one election might fail in the next. Republican attacks on Democratic cultural liberalism appeared to work in 2024, so it makes sense that Republicans are trying them out again this year. Maybe voters will respond similarly—or maybe they’ll decide that they now care more about economic issues on which Republicans currently face a reputational disadvantage.
Political scientists have repeatedly found that campaign spending in general elections normally produces, at best, modest and evanescent effects in voter preferences. But conventional wisdom gives it much greater weight. One reason is the prevalence of cynicism about politics, which makes it easy to believe that elections can easily be bought by wealthy elites or special interests—a view encouraged by left-aligned government reformers happy to claim that more stringent campaign finance regulation will cure the ills of politics. Another factor is the quantifiability of fundraising and spending, which provides an accessible and seemingly objective indicator of candidate and party success in the midst of an otherwise murky pre-election season.
Perhaps most importantly, political practitioners and media members inhabit a world in common, where smart strategies and ruthless tactics appear more decisive to electoral outcomes than they do from the relative remove of academia. In the midst of the fight, the deployment of millions of dollars here or there feels like a central part of the story. But with distance, the fumdamental factors that shape each year’s contests come more into view. Republicans don’t need to despair yet about this November, but whatever hope they have lies in those fundamentals more than whatever magic their ad wizards might cook up.