Outraged their candidate is showing a double-digit lead? Has to be a first.

Rep. Todd Akin (R-Mo.) trails Sen. Claire McCaskill (D-Mo.) by double digits in their Missouri Senate race, according to a survey released Thursday from conservative polling outlet Rasmussen.

McCaskill leads with 48 percent support, while Akin has 38 percent.

A previous survey from liberal-leaning Public Policy Polling, conducted and released only one day after Akin’s controversial “legitimate rape” remark, showed the Missouri congressman with a 44 to 43 percent lead.

The Rasmussen result marks an astonishing drop for Akin and indicates Republicans’ worst fears could come true — that Akin’s candidacy will cost them a Senate seat. Previous polls showed McCaskill was vulnerable and Akin was leading her.