Tied yesterday, Obama is suddenly down by 4 points. Anyone know why"

Unless you have not been following the news cycle of this past week,  you know that the campaign ad of a man blaming the death of his wife on Mitt Romney,  7 years after Romney left Bain Capital,  after it was revealed that the woman had her own insurance,  and after undeniable links to the Obama campaign have been found,  links that include a taped phone conversation with an Obama insider,  Stephanie Cutter,  was revealed – a conversation call-in to the Obama For America campaign center that involved Cutter and Mr. Scoptic - the complainant.  The backlash is clear and wonderful,  no??