WASHINGTON, D.C. — The Ohio Senate race is currently the most expensive Senate race in the country, with $197 million in future ad reservations, according to ad-tracking company AdImpact.

The spending comes amid a tight race that could change the balance of power in the Senate if Republican incumbent Bernie Moreno is able to defeat Democratic Sen. Sherrod Brown.

Both parties are spending heavily, with $104.3 million in ads reserved for Brown and $92.8 million reserved in ads for Moreno.

The Cook Political Report lists the race as a toss-up. Ads that move the needle for voters—even if just a little—could potentially change the outcome of the race.

Nearly 63,000 individual ads have aired in Ohio from January through May for all House and Senate candidates, according to the Wesleyan Media Project.

If the total spending were divided by the roughly 6 million Ohioans who voted in the 2020 presidential election, the cost per voter would be $33.

“It’s bananas,” said Peter Loge, director of George Washington University’s School of Media and Public Affairs, adding that the amount does not include spending on the presidential race, which could also boost Senate candidates.

“Trump is going to spend. So a dollar spent on the Trump campaign is 75 cents that bleeds down the ticket,” he said.

The amount of outside spending is notable in the race. Outside groups paid to reserve 76%  of ads for Brown and nearly 100% of ads for Moreno.

Brown’s campaign has reserved $24.8 million worth of ads until the November election, while Moreno’s has reserved $23,000, according to AdImpact.

Despite the jaw-dropping amount of money pouring into the race, it’s impossible to know whether any will change the outcome.

“Whether or not political ads change his mind is, is an open question,” Loge said. “You can't not run ads, but it's unclear what ads do.”

Ads do show, however, how candidates want to frame their campaigns, including the issues they address and whether the ads are positive or negative.

“In Ohio, the Republicans are largely running on, ‘Everything is wrong with America. We have to come fix America.’ And that's a negative message, right?” Loge said. “Senator Brown is saying, ‘We're getting better as Ohioans. We're getting better as a country. Come back and let's keep working to keep getting better.’”

In Ohio, healthcare is the most-mentioned topic in ads for both House and Senate candidates, followed by public safety, according to the Wesleyan Media Project.