Republican Senate hopefuls are getting crushed on airwaves across the country while their national campaign fund is pulling ads and running low on cash — leading some campaign advisers to ask where all the money went and to demand an audit of the committee’s finances, according to Republican strategists involved in the discussions.

In a highly unusual move, the National Republican Senatorial Committee this week canceled bookings worth about $10 million, including in the critical states of Pennsylvania, Wisconsin and Arizona. A spokesman said the NRSC is not abandoning those races but prioritizing ad spots that are shared with campaigns and benefit from discounted rates. Still, the cancellations forfeit cheaper prices that came from booking early, and better budgeting could have covered both.

“The fact that they canceled these reservations was a huge problem — you can’t get them back,” said one Senate Republican strategist, who like others spokes on the condition of anonymity to discuss internal matters. “You can’t win elections if you don’t have money to run ads.”

The NRSC’s retreat came after months of touting record fundraising, topping $173 million so far this election cycle, according to Federal Election Commission disclosures. But the committee has burned through nearly all of it, with the NRSC’s cash on hand dwindling to $28.4 million by the end of June.