Former vice presidential candidate Sarah Palin has not responded to supporters' ads urging her to run in for president -- but she apparently can relate to Herman Cain's difficulty in dealing with allegations of infidelity.

The group Conservatives 4 Palin, which describes itself as a grass-root blog bought television ads in Sioux City, Iowa.

The ad clips together chunks of past Palin speeches, decrying everything from the socialism of the current administration to crony capitalism. It also takes a still of President Barack Obama during his election night victory and wipes him away from the podium.

The challenge is not simply to replace Obama in 2012, Palin says at the end of the ad, adding, The real challenge is who and what we will replace him with. A text overlay reads Run Sarah Run.

In an appearance on Fox News' Hannity, Palin was not asked, nor did not mention the ad. She did, however, expound at length on Herman Cain's troubles.

After giving a rote if... then series of statements, Palin likened the troubles of a one time Republican presidential front runner to her own run-in with the tabloids.

I have had people who have sworn on a Bible that they have had affairs with Todd or had affairs with me or one specific one was a masseuse that she massaged me when I was seven months pregnant and she could tell that I wasn't pregnant, hence, Trigg was not my kid. And that resulted in this whole 'Trigg truther' issue that I still deal with every day, she said. I've had these liars out there trying to ruin my family and my reputation and my record. So I know what Herman Cain is going through. But again, as I say [...] if Cain did engage in these improprieties and is misleading the public, well, that's a whole other story then.

The topic of the Iowa ad never emerged during the interview. Palin also has yet to announce which Republican candidate she is endorsing. Could another round of speculation about her run emerge? Check out the ad below.