The prisoner abuse issue is becoming a "what did the president know and when did he know it?" question. The press loves this kind of thing ever since Watergate. It's pretty clear there was a report about prisoner abuse in both Iraq and Afghanistan that circulated to the White House many months ago, and the Congress is pissed off about being left out of the loop, so there may be some traction to the issue, even public hearings.
It could arise to a mini-Watergate summer. Fun, fun, fun.