WASHINGTON, DC - JULY 28:  Republican presidential candidate Dr. Ben Carson speaks at a anti-abortion rally opposing federal funding for Planned Parenthood in front of the U.S. Capitol July 28, 2015 in Washington, DC.  Planned Parenthood faces mounting criticism amid the release of videos by a pro-life group and demands to vote in the Senate to stop funding.   (Photo by Olivier Douliery/Getty Images)