Missouri Senator Claire McCaskill (D-MO) has released a scathing new ad hitting Todd Akin for his comments on “legitimate rape.”

The ad, titled “Prosecutor,” is airing statewide in Missouri.

“As a prosecutor, Claire McCaskill put hundreds of predators behind bars, fought on behalf of victims, counseled survivors of sexual violence. It’s why Claire understands that survivors of rape deserve the option of emergency contraception whether they accept it or not,” the ad’s narrator says.

“But Todd Akin opposes emergency contraception for victims of rape and incest. So it’s not what Todd Akin said. It’s what he believes.”

McCaskill has taken a clear lead in recent polls, and ads like this one will make it difficult for Akin to mount a comeback before Election Day. McCaskill, who raised $5.8 million in the last fundraising quarter, can and will blanket the airwaves with reminders of Akin’s extremist views. Without financial support from the National Republican Senatorial Committee, it’s hard to see how Akin can combat the negative onslaught.