Rep. Todd Akin

In this Feb. 18, 2012, photo, Senate candidate Rep. Todd Akin, R-Mo., waves to the crowd while introduced at a senate candidate forum in Kansas City, Mo. Akin vowed to fight on in his embattled Senate campaign as the deadline to exit the Nov. 6 elections loomed, Aug. 21, 2012, putting pressure on the Missouri congressman to abandon the race over his comments that women's bodies can prevent pregnancies in cases of "legitimate rape."

Akin said in an interview on Aug. 19, 2012, with St. Louis television station KTVI that pregnancy from rape is "really rare." Akin, who has said he opposes all abortions, said in the interview if a woman is raped, her body "has ways to shut that whole thing down." This Aug. 10, 2012 photo shows Akin taking questions after speaking at the Missouri Farm Bureau candidate interview and endorsement meeting in Jefferson City, Mo.

Akin takes a closer look at the new XM1203 Non-Line-of-Sight Cannon (NLOS-C) on the National Mall on June 11, 2008, in Washington, D.C.

In this Aug. 16, 2012, photo, Akin and his wife, Lulli, talk with reporters while attending the Governor's Ham Breakfast at the Missouri State Fair in Sedalia, Mo.

Akin speaks while he has lunch with airmen and soldiers Nov. 2, 2003 from Missouri that are serving at Kirkuk Air Base, Iraq. Akin visited Kirkuk as part of an Operational Overview tour for members of the House of Representatives.

This Aug. 10, 2012 photo shows Akin speaking at the Missouri Farm Bureau candidate interview and endorsement meeting in Jefferson City, Mo.

Akin announces his candidacy for U.S. Senate, May 17, 2011, in Creve Coeur, Mo.

This May 17, 2011, photo shows Akin announcing his candidacy for U.S. Senate, in Creve Coeur, Mo.