Washington (CNN) - Drawing parallels to her own experiences with rumor and political sniping, Sarah Palin used a Facebook posting Monday to defend the candidacy of South Carolina Republican gubernatorial hopeful Nikki Haley.
"As I said to Nikki this morning, 'Hang in there. I've been there. Any lies told about you will strengthen your resolve to clean up political and media corruption. You and your supporters will grow stronger through things like this.'"
Palin's reaction comes just hours after Haley denied a claim that she once had an extramarital affair with a prominent South Carolina political blogger.
Palin endorsed Haley earlier this month in a surprise move, and then traveled to South Carolina, where the two women appeared at a rally.
"There is some good news for your state," Palin said at the time. "And her name is Nikki Haley."
Haley now prominently features Palin's endorsement on her campaign website – and the Tea Party favorite has surged in the polls since appearing with Palin.
In her online posting, the former GOP vice presidential nominee makes clear she is standing by her endorsement of Haley.
"When Nikki and I held her endorsement rally on the steps of the beautiful and historic South Carolina state house last month, I warned her and her family that she would be targeted because she's a threat to a corrupt political machine, and she would be put through some hell," Palin wrote on Facebook.
Palin's post also harshly criticized Will Folks, the political website editor who wrote Monday that he had an "an inappropriate physical relationship" with Haley.
Urging South Carolinians to not believe the reports, Palin wrote, "[D]on't let some blogger make any accusation against your Nikki if the guy doesn't even have the guts or the integrity to speak further on such a significant claim."
After Haley issued her denial Monday, an associate of Folks told CNN: "He has nothing to add to his comments regarding this matter and will not be conducting any further interviews on the subject."
-CNN's Peter Hamby contributed to this report.