Writing on The Daily Beast, former NBC producer Robert Windrem reports that in April 2003, Dick Cheney's office suggested that interrogators waterboard an Iraqi detainee who was suspected of having knowledge of a link between Saddam and al Qaeda.

Sen. Sheldon Whitehouse was questioned on the issue today in two TV interviews. Speaking to CNN, Whitehouse allowed: "I have heard that to be true." To MSNBC, he noted that there was additional evidence of this in the Senate Armed Services committee report, and from Lawrence Wilkerson, former chief of staff to Colin Powell. "This thing is just getting deeper and deeper," said Whitehouse, noting that if it were true, it would significantly bolster the case for prosecutions.

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What I have learned is that as the administration authorized harsh interrogation in April and May of 2002 -- well before the Justice Department had rendered any legal opinion -- its principal priority for intelligence was not aimed at pre-empting another terrorist attack on the U.S. but discovering a smoking gun linking Iraq and al-Qa'ida.

In other words, Windrem's report today hardly comes out of the blue. In fact, the mounting evidence that the administration explicitly used torture to make a political case for the war in Iraq is only the latest reason why we need a full investigation of this whole dirty business.