His reaction has been very interesting to say the least.
The only criticism that has gotten even the slightest amount of traction is that Mr. Cain may have gotten a little flustered when he was answering a flurry of charged questions about a situation that happened many years ago. He admitted that he should have done a better job of anticipating what would be in the Politico hit piece.
Unless they can produce a semen stained red dress from a beautiful young intern... the only thing all of these despicable anonymous smears are going to do is enrage Mr. Cain's supporters and increase his name recognition among the uninitiated.