they could attack him directly ; even the usually detached romney edged that way tuesday , saying the allegations against cain were serious . the gop presidential candidates meet in michigan wednesday for a cnbc . will the herman cain allegations take center stage ? text size - + reset allen on gop debates politico 44 herman cain may not be viable much longer , unless he can manage to move the 2012 conversation away from the allegations of sexual harassment that have plagued his campaign . after three weeks ’ respite , the packed republican presidential debate season is about to return to full tilt . the 2012 republican primary is about to enter the elimination round . ” schnur , who now directs the university of southern california ’s unruh institute of politics , said cain article the cnbc debate kicks off tonight in the shadow of the cain circus . much has happened since , and although his polls numbers have flat - lined , not tanked , repeated allegations of sexual harassment or worse seem to be on their way to derailing the cain train . focusing on cain ’s circus rather than , say , high unemployment is bad for the republican brand , so they may instead let him bleed slowly as they avert their eyes .