Rep. Trey Gowdy, R-S.C. blasted President Obama for "pre-judging" the outcome of the IRS investigation for targeting Tea Party groups who applied for tax-exempt status.

Gowdy referred to Obama's assertion in a Fox News interview that there was “not even a smidgen of corruption” in the IRS case.

"How can he possibly draw that conclusion?" Gowdy asked, pointing out that former IRS official Lois Lerner invoked the Fifth Amendment and refused to testify.

"I understand why she invoked her Fifth Amendment privilege; I don't understand why in the hell the president of the United States would prejudge an investigation before any of your clients were interviewed," Gowdy said during a House Committee on Oversight and Government Reform hearing on Thursday while questioning American Center for Law and Justice lawyer Jay Sekulow, who represents Tea Party clients.

Gowdy revealed that none of Sekulow's 41 clients had been interviewed by any of the 13 Justice Department investigators during the six months of the investigation.