Key Points
- Republicans spent $2.95 billion on general-election advertising tracked by Kinetiq, compared with $2.59 billion for Democrats.
- Republican outside groups accounted for much of the difference, spending $1.87 billion compared with $1.35 billion for Democratic groups.
- Republicans accounted for 59 percent of measured advertising spending but generated 52 percent of swing-voter impressions during a five-week period.
Republicans outspent Democrats on political advertising during the 2026 midterm elections, although Democratic candidates spent more than their Republican opponents and reached persuadable voters at a lower average cost, according to new research from political advertising analytics company Kinetiq Political Insights (KPI).
In a study released by e-mail on Friday, KPI said Republican candidates and causes spent nearly $3 billion on TV, radio and digital advertising in general-election orders tracked through November 2, compared to just under $2.6 billion spent by Democrats over the same time period, giving Republicans a $366 million advantage across paid media.
The difference was largely driven by outside political organizations, which spent $1.87 billion supporting Republicans compared with $1.35 billion supporting Democrats, KPI said in its report.
Republicans held a larger advertising advantage in U.S. Senate contests, spending $1.24 billion compared with $1 billion for Democrats. In campaigns for seats at the U.S. House of Representatives, Democrats spent $841.3 million, slightly more than the $781 million spent by Republicans, KPI found.
KPI previously forecast $11.96 billion in political advertising spending for the full election cycle. Its preliminary analysis found that the higher-spending party won 24 of 29 Senate races examined, or nearly 40 percent of those campaigns.
The relationship was less consistent in eight of the most-expensive House contests with verified results: In those races, the higher-spending party won three contests, while the lower-spending party won five. The latter group included congressional contests in Florida, Texas and Pennsylvania.
In Texas, Republicans outspent Democrats by $188.4 million in the Senate race — which didn’t generate a strong return on investment, considering Democratic candidate James Talarico won the race for one of two U.S. Senate seats.
Separately, research from National Media Insights that combined KPI advertising data with VideoAmp audience measurement found differences in how efficiently the parties reached swing voters. Between September 9 and October 14, Republicans accounted for 59 percent of measured political advertising spending but generated 52 percent of impressions among swing voters.
Republican advertisers spent an average of $317 for every thousand swing-voter impressions, compared with $239 for Democrats, a difference of approximately 33 percent, according to that study.
The disparity was greater in Senate campaigns, where Republicans paid an average of $446 per thousand swing-voter impressions compared with $317 for Democrats. Texas recorded an even wider difference, with Republicans paying $478 per thousand impressions compared with $173 for Democrats.
The research also examined advertising messages during the final month of the campaign: An analysis of more than 1.7 million Democratic and Republican broadcast advertising airings between October 1 and November 2 found considerable differences in the issues emphasized by each party.
Democratic ad spots accounted for 96 percent of airings mentioning tariffs, 82 percent of those referencing data centers and 77 percent of those mentioning costs, while Republican ad spots accounted for 98 percent of airings mentioning transgender issues, 97 percent referencing China and 77 percent discussing crime.
President Donald Trump was also featured far more frequently in Democratic advertising: Of the broadcast airings mentioning Trump, 121,825 were Democratic advertisements compared with 3,137 Republican airings, giving Democrats approximately 97 percent of the total. Criticism or concerns about data center build-outs tied to the rapid scaling of artificial intelligence products was also featured in more than 100,000 ad spots across both parties, with Democratic candidates and causes accounting for most references, KPI said.
The findings indicate that Republicans invested more heavily in advertising overall, while Democratic campaigns emphasized economic concerns and criticism of Trump, KPI noted.
The study comes after several TV broadcasters reported a large windfall in political advertising revenue tied to higher interest in spot opportunities across their local stations in key battleground areas, particularly in states where races were ultra-competitive.
The country’s four largest independent TV broadcasters — Nexstar Media Group, Gray Media, the E. W. Scripps Company and Sinclair, Inc. — reported a combined total of $731.6 million in political ad income during the third quarter (Q3) of the year, the last full three-month financial period before Tuesday’s election, according to an analysis of earnings reports by The Desk. Nexstar’s political ad earnings were boosted by its TEGNA subsidiary, which operated as an independent business during the period.
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