It comes from none other than Sarah Palin:
"Pres. Obama says he called Sandra Fluke because of his daughters. For the sake of everyone's daughter, why doesn't his super PAC return the $1 million he got from a rabid misogynist?"
She's referring to Bill Maher, who has used far more foul language in characterizing women than Rush Limbaugh ever has but sits in Barack Obama's good graces.