Are you saying you buy the smears from the lame stream media?
Drudge's report that Cain is considering quitting is disturbing.
If your scenario is accurate (and I hope it is) - and if the reports of Cain's possible quitting are also manufactured - then he should stay in the race just on principle.
The trouble is, to paraphrase Rumsfeld, we don't know what we don't know.