Sen. Claire McCaskill (D-Mo.) raised a whopping $5.8 million dollars during the third quarter, a huge haul that is more than double what she brought in during the previous three-month period.

McCaskill’s impressive number adds to the woes of embattled Rep. Todd Akin (R-Mo.), who has struggled to raise money in his bid against the first-term Democrat. Akin has not  released his third quarter total.

Sen. Claire McCaskill (D-Mo.). (Jeff Roberson/AP)

The third quarter began on July 1 and ended on Sept. 30. In an interview broadcast Aug. 19, Akin stoked widespread controversy when he said that "legitimate rape” rarely causes pregnancy. The comment prompted much of Akin’s party to call for him to end his bid. He didn't, and has vowed to campaign all the way to November. But he'll likely do so without the help of well-funded Republican groups boosting GOP candidates in other Senate races.

Akin’s comment also appears to have helped McCaskill raise money, as she had about six weeks left in the third quarter after the congressman's controversial remarks aired. To put her total in perspective: McCaskill raised $2.6 million during the second quarter, a respectable sum, but one that looks modest compared to her latest outing.

McCaskill tweeted her fundraising total on Wednesday afternoon. She didn’t immediately reveal how much money she had in the bank.

As of late July, campaign finance reports showed Akin had about $500,000 on the bank, compared to the more than $3.4 million McCaskill reported on hand at the time.

In another competitive Senate race, former surgeon general Richard Carmona (D) doubled what he brought in during the second quarter, raising $2.2 million for his bid in Arizona against Rep. Jeff Flake (R). Flake hasn't yet released his third quarter number.

Updated at 3:21 p.m.