As long as Ron Paul gets to speak and his comments are not edited or spliced out of context to make it mean anything other than what he said, this is fair enough.
We get to hear what Ron Paul has said as well as what the other person has said, and it's up to the viewer to make the decision.
I've seen some Fox news coverage of Ron Paul and even though the post-commentary was stinging, unfair, spun completely out of context and untrue, they at least had the decency to air what Ron Paul said verbatim and did not edit it to make it appear like he said something else. (Or maybe I guess if they ever do sneaky editing like that on the mainstream network news, they will likely get sued.)
One has to be aware that filmmakers like Aaron Russo and Michael Moore get to utilize such splicing/editing techniques in their films all the time. I don't think Russo abuses it nearly as much as Michael Moore does however.