The majority, I would guess. But the trumped up Haliburton-Cheney connection is small potatoes compared to what they have planned between now and either Bush's impeachment, or the 2008 election. They're pulling out all the stops now, and the "average Joe" you're talking about will swallow most of the "this administration and their allies in Congress are corrupt" propaganda hook, line and sinker.
The Dems pulled out all of the stops during the 2004 election and look where it got them. Have a little faith in the basic intelligence of the American electorate.
Nope. The average Joe is not getting the credit he deserves. He has a computer now and no longer gets the news from the MSM.