Analysis of Senate Race Advertising Costs for 2026

According to an analysis of AdImpact data, the spending on advertisements by Democrats and Republicans in the Senate race could provide every voting-age resident of Maine with a $167 voucher for home heating oil. The analysis highlights that Senate seats vary in cost, with less-populated states having a higher dollar-per-voter ratio. Maine ranks first in this metric, followed by Alaska, which is expected to receive $76 million in advertisements, significantly impacting the state's ad inventory. Ohio, while fifth in the dollar-per-voter ranking, is projected to have the most expensive Senate race in the country for the second consecutive cycle, with Sherrod Brown's campaign proving more costly than his previous race. In New Hampshire, both parties are investing heavily to engage voters in a competitive race. The overall picture suggests that key Senate races will be crucial in determining control of both chambers. In Texas, outside GOP groups have spent $131 million in just 17 days to support Attorney General Ken Paxton, while in North Carolina, the anticipated spending for the Senate race is expected to be under $200 million, contrary to earlier predictions. Republicans currently have a spending advantage, particularly in Texas and Ohio, although both parties are still seeking effective strategies to reach voters with lower budgets.