Republican presidential candidate Herman Cain brings troubled campaign to Michigan tonight

Republican presidential candidate Herman Cain will speak to an audience tonight at Hillsdale College.  

But while Cain's speech will focus on his foreign policy positions, questions are being raised about his personal domestic relations.    

A Georgia businesswoman claimed this week that she and Cain have had a 13 year affair.  Cain denies the allegation. His campaign describes the allegation as 'dirty politics' and a 'smear'.   

The allegation follows reports that Cain has allegedly sexually harassed women in the past. Cain denies those allegations as well.  

There are multiple news media reports that Herman Cain is 'reassessing' his campaign. Herman Cain has dropped in Republican presidential polls since the allegations arose earlier this fall.

It is not known if Cain will address the latest allegation against him or the future of his presidential aspirations at tonight's event on the Hillsdale College campus.