Why Obama?
Because of this new discovered tape from the 2009 just released of deputy attorney general David Ogden at a press conference admitting they were under Obama's direction and leadership. Watch the short video below. Obama is busted along with Holder and Napolitano.
Obama knew about Gun Walking in March, 2009 - YouTube
So Holder has certainly perjured himself.
Didn't Obama specifically deny knowledge of this?
I think he did not sure