"The Abu Ghraib prison in Iraq, where a unit of U.S. soldiers abused prisoners, is just the largest and suddenly most notorious in a worldwide constellation of detention centers -- many of them secret and all off-limits to public scrutiny -- that the U.S. military and CIA have operated in the name of counterterrorism or counterinsurgency operations since the Sept. 11, 2001, attacks." The Washington Post: The Secret World of US Interrogation

Also, on Nightline, McCain referred to the difference between Guantanamo and Abu Ghraib, saying that unlike the prisoners in Cuba those in Iraq had rights under the Geneva Convention. In that regard he's chosen to follow the administration's absurd moral logic.