A common view among those involved with the talks is that any early effort to prosecute Bush administration officials would likely devolve quickly into ugly and fruitless partisan warfare. Second is that even if Obama decided he had the appetite for it, prosecutions in this arena are problematic at best: A series of memos from the Bush Justice Department approved the harsh tactics, and Congress changed the War Crimes Act in 2006, making prosecutions of individuals involved in interrogations more difficult.

Instead, a commission empowered by Congress would have the authority to compel witnesses to testify and even to grant immunity in exchange for information. Should a particularly ugly picture emerge, the option of prosecutions would still theoretically be on the table later, however unlikely.

In Obama's camp, there is a sense among some that such a commission would essentially mean letting Bush get away with crimes. "People have called for criminal investigations," one person familiar with the talks told me this summer as plans got under way. On Wednesday, a person participating in the talks confirmed that some people involved in the planning felt strongly that the commission would amount to "bullshit" and that Bush officials should be prosecuted to the full extent of the law.

But few think prosecutions are realistic, given the formidable legal hurdles and the huge policy problems competing for Obama's attention. Among them is the complicated task of closing down the military prison at Guantánamo Bay, which Obama advisors say is a priority. Some observers outside the Obama camp are also questioning how much Democrats really want exposed with regard to interrogation, since top Democrats in Congress were briefed in secret on some of the harshest tactics used by the CIA and appear to have done little, or perhaps nothing, to stop them.