To me the question was redundant. Knowing how Conservatives run campaigns it is stupidity to wonder why more investigation into Obama's past was not conducted. There was a lot of money spent trying to dig up dirt on Obama by the conservatives. The talk show hosts made it their priority to try and discredit Obama. Hell Rush Bimbo spent some of his own drug money to uncover Obama's misdeeds.
One could ask the same questions about investigations into McCains past like his relationship with G. Liddy and McCains support of Liddys actions. Where was the press on that issue.
Its just more of the same old sour grapes because there candidate was not chosen.
Get over it