Palin aide Rebecca Mansour told USA Today the uptick in threats is "incredible," while another aide, speaking on condition of anonymity, also confirmed the increase to CBS News.
"There has been an incredible increase in death threats against Governor Palin since the tragedy in Arizona, since she's been accused of having the blood of those victims on her hands," Mansour said. "When you start to accuse people of having the blood of innocent people on their hands, it incites violence."
Palin has come under fire for her political map displaying cross hairs over the districts of Democratic representatives she asked supporters to target during the November midterm elections.
On Wednesday Palin posted a Facebook video warning "journalists and pundits" not to create a "blood libel that serves only to incite the very hatred and violence that they purport to condemn."