PHOTO: Missouri Republican Senate candidate, Rep. Todd Akin, R-Mo., gives two thumbs up as he enters a Republican campaign office to visit with supporters, Nov. 5, 2012, in Florissant, Mo.
PHOTO: This photo combo shows U.S. Rep. Todd Akin, R-Mo., left, and Sen. Claire McCaskill, D-Mo.
PHOTO: Republican Rep. Todd Akin, left, speaks as he takes on Democratic Sen. Claire McCaskill during the second debate in the Missouri Senate race, Oct. 18, 2012, in Clayton, Mo.
PHOTO: Former Speaker of the House Newt Gingrich and U.S. Rep. Todd Akin address the media on Sept. 24, 2012 in Kirkwood, Missouri.
VIDEO: Mitt Romney, Paul Ryan scramble to hold onto women voters amid Rep. Todd Akin's rape comments.
PHOTO: Senate candidate Rep. Todd Akin, R-Missouri, waves to the crowd while introduced at a senate candidate forum during a Republican conference in Kansas City, Mo., Feb 18, 2012.
PHOTO: This Aug. 10, 2012 file photo shows Todd Akin, Republican, candidate for U.S. Senator from Missouri, speaks at the Missouri Farm Bureau candidate interview and endorsement meeting in Jefferson City, Mo.
PHOTO: Rep. Todd Akin, R-Mo., speaks during a news conference on the new Health and Human Services Department abortion rule on Wednesday, March 21, 2012;Republican vice presidential candidate, U.S. Rep. Paul Ryan (R-WI) speaks to supporters at a campaign
PHOTO: Rep. Todd Akin, R-Mo., speaks during a news conference on the new Health and Human Services Department abortion rule, March 21, 2012.