Why do RepCons now claim Obama has tripled the national debt. Pure propaganda or factual?

Anyone who starts off by saying "please provide data from my pre-approved source" doesn't want to debate and will probably not accept being wrong when proven so. It doesn't matter if it's a legitimate source such as the CBO. The point that you are not willing to accept outsider information and opinion already proves you have no intention of conceding defeat when proven wrong.