Former congressman Ron Paul was asked on the Fox Business show "The Independents" about the decision to publish on the web site of the Ron Paul Institute, which he chairs, an article by Paul Craig Roberts asserting "The conclusion is increasingly difficult to avoid that elements of the US government blew up three New York skyscrapers in order to destroy Iraq, Afghanistan, Libya, Somalia, Syria, Iran, and Hezbollah and to launch the US on the neoconservatives agenda of US world hegemony."
His answer, which can be viewed at the 7:25 mark on the video, was disappointing: "People should have a right to express their viewpoints...That doesn't mean I endorse what he said...He shouldn't be excluded because he takes that particular position...I don't believe government commissions ever get to the bottom of anything."
Update: Matt Welch, an anchor of The Independents, has a transcript and some intelligent thoughts on this matter up at Reason here.