The attack? Bernardine Dohrn, Ayers' wife and fellow former Weatherman, went to work in 1984 for the major Chicago-based national law firm of Sidley & Austin, and three years later, Michelle joined the mega-firm as well.
...
Murtagh didn't even bother alleging that the two even knew each other, instead suggesting that they
might have. If so, he said, the Obamas have known the two longer than suspected.
"If it is true" that the two women knew each other, Murtagh said, "the relationship is almost a decade older than Senator Obama has acknowledged. And that can very easily be resolved by Senator Obama, by Mrs. Obama, by Mr. Ayers and by Ms. Dohrn."