The two candidates competing in the Republican runoff for the Alabama Senate seat vacated by Attorney General Jeff Sessions have agreed to debate one another without a moderator, according to a report.

Campaign officials for Sen. Luther Strange, R-Ala., and challenger Roy Moore said the two Republicans will go head-to-head, though the details of the debate haven't yet been finalized, according to AL.com.

Strange and Moore were supposed to participate a candidates' forum sponsored by the Alabama Policy Institute on Sept. 21. But Moore withdrew from the event because the president of the Alabama Policy Institute, Caleb Crosby, is the treasurer the Senate Leadership Fund, a super PAC connected to Senate Majority Leader Mitch McConnell.

The Senate Leadership Fund is backing Strange.

"We are glad Luther Strange has agreed to our challenge of an honest and open debate, with no conditions," the Moore campaign said, according to AL.com.

The runoff is scheduled for Sept. 26. The winner of the runoff will face Democrat Doug Jones in the general election Dec. 12.