Yesterday Norm Coleman’s campaign trotted out Sen. Joe Lieberman to defend his record as chairman of the Senate’s Permanent Subcommittee on Investigations, which has been repeatedly criticized by challenger Al Franken. Today the Franken camp released a statement from Sen. Frank Lautenberg (pictured) supporting the Democrat’s assertion that Coleman failed to provide any oversight of fraud and waste stemming from the reconstruction of Iraq.

“I was eager to get to the bottom of the serious allegations against Halliburton and other contractors — potentially the biggest wartime rip-off in our country’s history,” the statement from Lautenberg reads. “But Norm Coleman and the Republican leadership of the committee simply refused to to investigate. Even after multiple requests from me and my colleagues to get the committee to do its job and get to the bottom of it — they refused.”

Lautenberg states that he wrote nine letters to the committee leadership seeking an investigation, but was rebuffed. He links the lack of scrutiny to the fact that VP Dick Cheney was formerly the chief executive of Halliburton, the largest recipient of Iraq contracts. “When it was time to choose between protecting taxpayer dollars and our troops or protecting Dick Cheney from embarrassment, Norm Coleman chose Dick Cheney,” the statement concludes.

The two campaigns are each running television ads sparring over the issue. Here’s the Franken spot:

And the Coleman rebuttal: