No one seems to be talking about Herman Cain's 9-9-9 tax plan this week — including Herman Cain. Instead, he's had to deal with allegations that he committed sexual harassment when he was head of the National Restaurant Association.
On Wednesday night, he accused Texas Gov. Rick Perry's presidential campaign of planting the story. Perry's campaign flatly denied it, and Cain has backed off.
Regardless, some political consultants have seen the invisible hand of opposition research during this campaign season — what's known as the "dark art of politics."